American pilots engage in first dogfight over the western front

Year
1918
Month Day
April 14

Six days after being assigned for the first time to the western front, two American pilots from the U.S. First Aero Squadron engage in America’s first aerial dogfight with enemy aircraft. In a battle fought almost directly over the Allied Squadron Aerodome at Toul, France, U.S. fliers Douglas Campbell and Alan Winslow succeeded in shooting down two German two-seaters. By the end of May, Campbell had shot down five enemy aircraft, making him the first American to qualify as a “flying ace” in World War I.

The First Aero Squadron, organized in 1914 after the outbreak of World War I, undertook its first combat mission on March 19, 1917, in support of the 7,000 U.S. troops that invaded Mexico to capture Mexican revolutionary Pancho Villa. Despite numerous mechanical and navigational problems, the American fliers flew hundreds of scouting missions for U.S. Brigadier General John J. Pershing and gained important experience that would later be used over the battlefields of Europe in World War I.

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Zimmermann Telegram presented to U.S. ambassador


Year
1917
Month Day
February 24

During World War I, British authorities give Walter H. Page, the U.S. ambassador to Britain, a copy of the “Zimmermann Telegram,” a coded message from Arthur Zimmermann, the German foreign secretary, to Count Johann von Bernstorff, the German ambassador to Mexico. In the telegram, intercepted and deciphered by British intelligence in late January, Zimmermann stated that in the event of war with the United States, Mexico should be asked to enter the conflict as a German ally. In return, Germany promised to restore to Mexico the lost territories of Texas, New Mexico and Arizona.

After receiving the telegram, Page promptly sent a copy to U.S. President Woodrow Wilson, who in early March allowed the U.S. State Department to publish the note. The press initially treated the telegram as a hoax, but Arthur Zimmermann himself confirmed its authenticity. The Zimmermann Telegram helped turn U.S. public opinion, already severely strained by repeated German attacks on U.S. ships, firmly against Germany. On April 2, President Wilson, who had initially sought a peaceful resolution to end World War I, urged the immediate U.S. entrance into the war. Four days later, Congress formally declared war against Germany.

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U-boat devastates British squadron

Year
1914
Month Day
September 22

In the North Sea, the German U-9 submarine sinks three British cruisers, the Aboukir, the Hogue and the Cressy, in just over one hour. The one-sided battle, during which 1,400 British sailors lost their lives, alerted the British to the deadly effectiveness of the submarine, which had been generally unrecognized up to that time.

The German U-boat was a submarine far more sophisticated than those built by other nations at the time. The typical U-boat was 214 feet long, carried 35 men and 12 torpedoes, and could travel underwater for two hours at a time. In the first few years of World War I, the U-boats took a terrible toll on Allied shipping. Germany’s quarantine of the British Isles was almost successful, but in 1917 unrestricted U-boat attacks on neutral American vessels traveling to Britain prompted the U.S. entrance into the war. The infusion of American ships, troops and arms into World War I turned the tide of the war against Germany.

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Second Battle of the Somme ends

Year
1918
Month Day
April 04

During World War I, the Second Battle of the Somme, the first major German offensive in more than a year, ends on the western front.

On March 21, 1918, a major offensive against Allied positions in the Somme River region of France began with five hours of bombardment from more than 9,000 pieces of German artillery. The poorly prepared British Fifth Army was rapidly overwhelmed and forced into retreat. For a week, the Germans pushed toward Paris, shelling the city from a distance of 80 miles with their “Big Bertha” cannons. However, the poorly supplied German troops soon became exhausted, and the Allies halted the German advance as French artillery knocked out the German guns besieging Paris. On April 2, U.S. General John J. Pershing sent American troops down into the trenches to help defend Paris and repulse the German offensive. It was the first major deployment of U.S. troops in World War I. Several thousand American troops fought alongside the British and French in the Second Battle of Somme.

By the time the Somme offensive ended on April 4, the Germans had advanced almost 40 miles, inflicted some 200,000 casualties, and captured 70,000 prisoners and more than 1,000 Allied guns. However, the Germans suffered nearly as many casualties as their enemies and lacked the fresh reserves and supply boost the Allies enjoyed following the American entrance into the fighting.

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Mussolini founds the Fascist party


Year
1919
Month Day
March 23

Benito Mussolini, an Italian World War I veteran and publisher of Socialist newspapers, breaks with the Italian Socialists and establishes the nationalist Fasci di Combattimento, named after the Italian peasant revolutionaries, or “Fighting Bands,” from the 19th century. Commonly known as the Fascist Party, Mussolini’s new right-wing organization advocated Italian nationalism, had black shirts for uniforms, and launched a program of terrorism and intimidation against its leftist opponents.

In October 1922, Mussolini led the Fascists on a march on Rome, and King Emmanuel III, who had little faith in Italy’s parliamentary government, asked Mussolini to form a new government. Initially, Mussolini, who was appointed prime minister at the head of a three-member Fascist cabinet, cooperated with the Italian parliament, but aided by his brutal police organization he soon became the effective dictator of Italy. In 1924, a Socialist backlash was suppressed, and in January 1925 a Fascist state was officially proclaimed, with Mussolini as Il Duce, or “The Leader.”

Mussolini appealed to Italy’s former Western allies for new treaties, but his brutal 1935 invasion of Ethiopia ended all hope of alliance with the Western democracies. In 1936, Mussolini joined Nazi leader Adolf Hitler in his support of Francisco Franco’s Nationalist forces in the Spanish Civil War, prompting the signing of a treaty of cooperation in foreign policy between Italy and Nazi Germany in 1937. Although Adolf Hitler’s Nazi revolution was modeled after the rise of Mussolini and the Italian Fascist Party, Fascist Italy and Il Duce proved overwhelmingly the weaker partner in the Berlin-Rome Axis during World War II.

In July 1943, the failure of the Italian war effort and the imminent invasion of the Italian mainland by the Allies led to a rebellion within the Fascist Party. Two days after the fall of Palermo on July 24, the Fascist Grand Council rejected the policy dictated by Hitler through Mussolini, and on July 25 Il Duce was arrested. Fascist Marshal Pietro Badoglio took over the reins of the Italian government, and in September Italy surrendered unconditionally to the Allies. Eight days later, German commandos freed Mussolini from his prison in the Abruzzi Mountains, and he was later made the puppet leader of German-controlled northern Italy. With the collapse of Nazi Germany in April 1945, Mussolini was captured by Italian partisans and on April 29 was executed by firing squad with his mistress, Clara Petacci, after a brief court-martial. Their bodies, brought to Milan, were hanged by the feet in a public square for all the world to see.

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Germans introduce poison gas

Year
1915
Month Day
April 22

On April 22, 1915, German forces shock Allied soldiers along the western front by firing more than 150 tons of lethal chlorine gas against two French colonial divisions at Ypres, Belgium. This was the first major gas attack by the Germans, and it devastated the Allied line.

Toxic smoke has been used occasionally in warfare since ancient times, and in 1912 the French used small amounts of tear gas in police operations. At the outbreak of World War I, the Germans began actively to develop chemical weapons. In October 1914, the Germans placed some small tear-gas canisters in shells that were fired at Neuve Chapelle, France, but Allied troops were not exposed. In January 1915, the Germans fired shells loaded with xylyl bromide, a more lethal gas, at Russian troops at Bolimov on the eastern front. Because of the wintry cold, most of the gas froze, but the Russians nonetheless reported more than 1,000 killed as a result of the new weapon.

READ MORE: Tech Developments of World War I 

On April 22, 1915, the Germans launched their first and only offensive of the year. Known as the Second Battle of Ypres, the offensive began with the usual artillery bombardment of the enemy’s line. When the shelling died down, the Allied defenders waited for the first wave of German attack troops but instead were thrown into panic when chlorine gas wafted across no-man’s land and down into their trenches. The Germans targeted four miles of the front with the wind-blown poison gas and decimated two divisions of French and Algerian colonial troops. The Allied line was breached, but the Germans, perhaps as shocked as the Allies by the devastating effects of the poison gas, failed to take full advantage, and the Allies held most of their positions.

A second gas attack, against a Canadian division, on April 24, pushed the Allies further back, and by May they had retreated to the town of Ypres. The Second Battle of Ypres ended on May 25, with insignificant gains for the Germans. The introduction of poison gas, however, would have great significance in World War I.

Immediately after the German gas attack at Ypres, France and Britain began developing their own chemical weapons and gas masks. With the Germans taking the lead, an extensive number of projectiles filled with deadly substances polluted the trenches of World War I. Mustard gas, introduced by the Germans in 1917, blistered the skin, eyes, and lungs, and killed thousands. Military strategists defended the use of poison gas by saying it reduced the enemy’s ability to respond and thus saved lives in offensives. In reality, defenses against poison gas usually kept pace with offensive developments, and both sides employed sophisticated gas masks and protective clothing that essentially negated the strategic importance of chemical weapons.

The United States, which entered World War I in 1917, also developed and used chemical weapons. Future president Harry S. Truman was the captain of a U.S. field artillery unit that fired poison gas against the Germans in 1918. In all, more than 100,000 tons of chemical weapons agents were used in World War I, some 500,000 troops were injured, and almost 30,000 died, including 2,000 Americans.

In the years following World War I, Britain, France, and Spain used chemical weapons in various colonial struggles, despite mounting international criticism of chemical warfare. In 1925, the Geneva Protocol of 1925 banned the use of chemical weapons in war but did not outlaw their development or stockpiling. Most major powers built up substantial chemical weapons reserves. In the 1930s, Italy employed chemical weapons against Ethiopia, and Japan used them against China. In World War II, chemical warfare did not occur, primarily because all the major belligerents possessed both chemical weapons and the defenses–such as gas masks, protective clothing, and detectors–that rendered them ineffectual. In addition, in a war characterized by lightning-fast military movement, strategists opposed the use of anything that would delay operations. Germany, however, did use poison gas to murder millions in its extermination camps.

Since World War II, chemical weapons have only been used in a handful of conflicts–the Yemeni conflict of 1966-67, the Iran-Iraq War of 1980-88–and always against forces that lacked gas masks or other simple defenses. In 1990, the United States and the Soviet Union signed an agreement to cut their chemical weapons arsenals by 80 percent in an effort to discourage smaller nations from stockpiling the weapons. In 1993, an international treaty was signed banning the production, stockpiling (after 2007), and use of chemical weapons. It took effect in 1997.

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First air raid on Britain


Year
1915
Month Day
January 19

During World War I, Britain suffers its first casualties from an air attack when two German zeppelins drop bombs on Great Yarmouth and King’s Lynn on the eastern coast of England.

The zeppelin, a motor-driven rigid airship, was developed by German inventor Ferdinand Graf von Zeppelin in 1900. Although a French inventor had built a power-driven airship several decades before, the zeppelin’s rigid dirigible, with its steel framework, was by far the largest airship ever constructed. However, in the case of the zeppelin, size was exchanged for safety, as the heavy steel-framed airships were vulnerable to explosion because they had to be lifted by highly flammable hydrogen gas instead of non-flammable helium gas.

In January 1915, Germany employed three zeppelins, the L.3, the L.4, and the L.6, in a two-day bombing mission against Britain. The L.6 turned back after encountering mechanical problems, but the other two zeppelins succeeded in dropping their bombs on English coastal towns.

READ MORE: London’s World War I Zeppelin Terror

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First U.S. air combat mission begins


Year
1916
Month Day
March 19

Eight Curtiss “Jenny” planes of the First Aero Squadron take off from Columbus, New Mexico, in the first combat air mission in U.S. history. The First Aero Squadron, organized in 1914 after the outbreak of World War I, was on a support mission for the 7,000 U.S. troops who invaded Mexico to capture Mexican revolutionary Pancho Villa.

On March 9, 1916, Villa, who opposed American support for Mexican President Venustiano Carranza, led a band of several hundred guerrillas across the border on a raid of the town of Columbus, New Mexico, killing 17 Americans. On March 15, under orders from President Woodrow Wilson, U.S. Brigadier General John J. Pershing launched a punitive expedition into Mexico to capture Villa. Four days later, the First Aero Squadron was sent into Mexico to scout and relay messages for General Pershing.

Despite numerous mechanical and navigational problems, the American fliers flew hundreds of missions for Pershing and gained important experience that would later be used by the pilots over the battlefields of Europe. However, during the 11-month mission, U.S. forces failed to capture the elusive revolutionary, and Mexican resentment over U.S. intrusion into their territory led to a diplomatic crisis. In late January 1917, with President Wilson under pressure from the Mexican government and more concerned with the war overseas than with bringing Villa to justice, the Americans were ordered home.

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First World War erupts

Year
1914
Month Day
August 01

Four days after Austria-Hungary declared war on Serbia, Germany and Russia declare war against each other, France orders a general mobilization, and the first German army units cross into Luxembourg in preparation for the German invasion of France. During the next three days, Russia, France, Belgium and Great Britain all lined up against Austria-Hungary and Germany, and the German army invaded Belgium. The “Great War” that ensued was one of unprecedented destruction and loss of life, resulting in the deaths of some 20 million soldiers and civilians.

On June 28, 1914, in an event that is widely regarded as sparking the outbreak of World War I, Archduke Franz Ferdinand, heir to the Austro-Hungarian empire, was shot to death with his wife by Bosnian Serb Gavrilo Princip in Sarajevo, Bosnia. Ferdinand had been inspecting his uncle’s imperial armed forces in Bosnia and Herzegovina, despite the threat of Serbian nationalists who wanted these Austro-Hungarian possessions to join newly independent Serbia. Austria-Hungary blamed the Serbian government for the attack and hoped to use the incident as justification for settling the problem of Slavic nationalism once and for all. However, as Russia supported Serbia, an Austria-Hungary declaration of war was delayed until its leaders received assurances from German leader Kaiser Wilhelm II that Germany would support their cause in the event of a Russian intervention.

READ MORE: Outbreak of World War I

On July 28, Austria-Hungary declared war on Serbia, and the tenuous peace between Europe’s great powers collapsed. On July 29, Austro-Hungarian forces began to shell the Serbian capital of Belgrade, and Russia, Serbia’s ally, ordered a troop mobilization against Austria-Hungary. France, allied with Russia, began to mobilize on August 1. France and Germany declared war against each other on August 3. After crossing through neutral Luxembourg, the German army invaded Belgium on the night of August 3-4, prompting Great Britain, Belgium’s ally, to declare war against Germany.

For the most part, the people of Europe greeted the outbreak of war with jubilation. Most patriotically assumed that their country would be victorious within months. Of the initial belligerents, Germany was most prepared for the outbreak of hostilities, and its military leaders had formatted a sophisticated military strategy known as the “Schlieffen Plan,” which envisioned the conquest of France through a great arcing offensive through Belgium and into northern France. Russia, slow to mobilize, was to be kept occupied by Austro-Hungarian forces while Germany attacked France.

READ MORE: Life in the Trenches of World War I

The Schlieffen Plan was nearly successful, but in early September the French rallied and halted the German advance at the bloody Battle of the Marne near Paris. By the end of 1914, well over a million soldiers of various nationalities had been killed on the battlefields of Europe, and neither for the Allies nor the Central Powers was a final victory in sight. On the western front–the battle line that stretched across northern France and Belgium–the combatants settled down in the trenches for a terrible war of attrition.

In 1915, the Allies attempted to break the stalemate with an amphibious invasion of Turkey, which had joined the Central Powers in October 1914, but after heavy bloodshed the Allies were forced to retreat in early 1916. The year 1916 saw great offensives by Germany and Britain along the western front, but neither side accomplished a decisive victory. In the east, Germany was more successful, and the disorganized Russian army suffered terrible losses, spurring the outbreak of the Russian Revolution in 1917. By the end of 1917, the Bolsheviks had seized power in Russia and immediately set about negotiating peace with Germany. In 1918, the infusion of American troops and resources into the western front finally tipped the scale in the Allies’ favor. Bereft of manpower and supplies and faced with an imminent invasion, Germany signed an armistice agreement with the Allies in November 1918.

World War I was known as the “war to end all wars” because of the great slaughter and destruction it caused. Unfortunately, the peace treaty that officially ended the conflict—the Treaty of Versailles of 1919—forced punitive terms on Germany that destabilized Europe and laid the groundwork for World War II.

READ MORE: Why Kaiser Wilhelm Was Never Tried for Starting World War I

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Armistice signed in First Balkan War

Bulgaria, Serbia, Greece and Montenegro sign an armistice with Turkey, ending the fighting in the first Balkan War. During the two-month conflict, a military coalition between Greece, Serbia, Bulgaria, and Montenegro—known as the Balkan League—expelled Turkey from all the Ottoman Empire’s former European possessions, with the exception of Constantinople (now Istanbul). In January 1913, a coup d’etat in Turkey led to a resumption of fighting, but the Balkan League was again victorious.

In 1913, hostilities resumed after Serbia and Greece demanded that Bulgaria cede to them portions of Macedonia. Serbia and Greece formed an alliance against Bulgaria, and Macedonia was partitioned between the victors. Nationalist tension persisted in the Balkans, and Serbia was particularly bitter about being forced to give up some of its conquests by the Austro-Hungarian Empire. The signing of the Treaty of London formally ended the Balkan War on May 30, 1913

On June 28, 1914, hostility between Serbia and Austria-Hungary over Austria’s possession of Bosnia-Herzegovina reached a breaking point when Serbian nationalist Gavrilo Princip assassinated Austrian Archduke Franz Ferdinand in Sarajevo. Austria-Hungary blamed the Serbian government for the attack and hoped to use the incident as justification for settling the problem of Serbian nationalism once and for all. However, as Russia supported Serbia, an Austro-Hungarian declaration of war was delayed until its leaders received assurances from German leader Kaiser Wilhelm that Germany would support their cause in the event of a Russian intervention.

On July 28, Austria-Hungary declared war on Serbia, and the tenuous peace between Europe’s great powers collapsed. Within a week, Russia, Belgium, France, Great Britain and Serbia had lined up against Austria-Hungary and Germany, and World War I had begun.

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