Austria-Hungary began to acquire the states of Bosnia and Herzegovina upon the collapse of the Ottoman Empire, and many Serbians were opposed to the new regime
The Black Hand - Serbian super nationalist group that planned to assassinate the Archduke of Austria-Hungary, believing this would lead to an independent Bosnia
GavriloPrincip, a member of the Black Hand, fired the shot that killed Archduke Franz Ferdinand and his wife
June 28, 1914
Sides in WWI
Allied Powers- GreatBritain, France, and Russia
Central Powers- Germany, Austria-Hungary, and the Ottoman Empire
The French army was not prepared to fight against the German army, which was equipped with the newest technology in warfare: The Machine Gun
A German machine gun had 50 to 100 times the firepower of one French rifle, resulting in nearly 15,000 French deaths a day
The First Battle of Marne began
September 7, 1914
The First Battle of Marne involved more than 2 million soldiers along a 125 mile battlefront, with the French pushing back the Germans 40 miles, but resulting in over 250,000 lives lost
Trench Warfare
Soldiers built massive networks of trenches to protect themselves from artillery shells, machine gun fire, and grenades
Over 400 miles of trenches were dug on the Western Front
Soldiers lived in very harsh conditions, sleeping, eating, and being treated for wounds or left for dead in the trenches
Soldiers had to constantly be aware of the enemy and stay below the trenches walls
"No Man's Land" is where many soldiers would lost their lives
Birth of Modern Warfare Technology
The tank invented in 1915, was used to level areas in "no man's land" and to enter enemy trenches
Poison gas - invented in Germany and first used in WWI, with chlorine gas destroying the lungs of soldiers
The first time airplanes were used in warfare, with planes getting in air battles known as "dogfights" and harassing the trenches
Airplanes were later mounted with machine guns
The United States had a strong tradition of isolationism before WWI
Germany began using their U-boats as a weapon against the Allied powers
The Lusitania, a British luxury liner carrying over 1900 passengers was torpedoed by a German U-Boat, killing 1200 people, including 128 Americans
May 1, 1915
The Sussex was torpedoed once again by German U-boats
March 24, 1916
Germany issued the Sussex Pledge, telling the US they would not torpedo any merchant ship without warning
Germany reassumed unrestricted submarine warfare forcing the US to cut off diplomatic relations
February 1917
The Zimmerman note was a proposal by Arthur Zimmerman to Mexico to declare war on the US, with Mexico to reacquire its old provinces of Texas, New Mexico and Arizona
Wilson asked for a Declaration of War, and the United States joined the Allied Forces on April61917
April 2, 1917
In order to raise an army for the war in Europe, Congress passed the Selective Service Act in May of 1917
The Americans that fought in Europe were known as the AEF (American Expeditionary Force) led by General John J. Pershing
To transport troops to Europe safely, the US used the convoy system, in which troop transports were surrounded by destroyers or cruisers for protection
In November of 1917, the Bolsheviks took control of the Russian government and withdrew the Russian army from the Eastern Front, allowing the Germans to focus all its forces on the Western Front
US troops did not see action for nearly a year, but were a major factor in WWI, helping defeat the Germans at Chateau-Thierry and Belleau Wood, which prevented the Germans from taking Paris
American women played a vital role in WWI, working as switchboard operators, nurses, typists, bookkeepers, radio operators, electricians, and telegraphers
In 1918, the Germans began to suffer crippling defeats in France, as the war had crippled the German economy and people began to suffer from starvation, leading to armies beginning to surrender