Why Did World War 1 start

World War 1 started because Serbia killed Austria-Hungry's arch duke Franz Ferdinand. Austria-Hungry then declared war on Serbia. Then Russa prepared to fight and helped Serbia fight against Austria-Hungry. Then Germany was allied with Austria-Hungry and told Russia army not to fight. Germany declared war on Russia. Germany was afraid they would have to fight in two plaices.

Why did the U.S. enter the war

The U.S. entered the war because a German submarine sank the Lusitania. The submarine 1,959 passengers and the crew, 1,198 people were drowned even 128 Americans. Then the U.S. joined the allied powers.

Weapons of World War 1

There were a lot of weapons in WW1 like tanks, poison gasses, grenades, and bombing planes. In WW1 some avenges like the French had 3870 tanks, the British had 2636 tanks, the U.S. had less than 100 tanks, and Germany only had 20 tanks. In WW1 there was the first poison gasses witch led to the first gas masks.

How did the war end

In September 1918 more than one million U.S. troops fought in a huge battle in the Meuse-Argonne. More Americans fought in this battle than any other single battle in the United States history. The central powers lost 3 million solders and nearly 3.5 million civilians. The allied powers lost nearly 5 million solders and more than 5 million civilians. It was called war to end all wars.