The USA joined in the war because the USA was part of the Triple alliance in the first place, and after Germany attacked the USA's submarines and battleships, they then joined the war in 1917.
No, the causes of world war II is Germany invading Poland in September of 1939. What made the U.S enter was Japan attacking and bombing Pearl Harbor.
Germany was on the losing side of World War 1.
Germany invaded Belgium on August 4, 1914, as part of its strategy to attack France through the north. This violation of Belgian neutrality prompted Britain to declare war on Germany, while France was already allied with Russia and bound to enter the conflict. Consequently, the invasion of Belgium was a key trigger that led both Britain and France to enter World War I.
Germany
April 7, 1917. Declared war on Germany.
sinking of lusitania
The United Kingdom officially declared war on Germany on August 4, 1914, thereby entering World War I.
Germany's unrestricted submarine warfare
They could not afford to enter into another war if Germany reacted badly to not getting what it wanted.
Germany's unrestricted submarine warfare
Germany attempting to form a military alliance with Mexico.
Zimmerman
The USA joined in the war because the USA was part of the Triple alliance in the first place, and after Germany attacked the USA's submarines and battleships, they then joined the war in 1917.
No, the causes of world war II is Germany invading Poland in September of 1939. What made the U.S enter was Japan attacking and bombing Pearl Harbor.
No. Germany lost World War I.
Japan and Italy fought against Germany in World War 1 but were on Germany's side in World War 2