The German U-Boat--sinkings of the Lusitania and numerous cargo/merchant vessels even just off our coast lead to US involvement
In World War 2, the bombing of Pearl Harbor by the Japanese drew the U.S. into the war.
Germany's invasion of Belgium, the sinking of the Lusitania, and the Zimmermann note drew the U.S. into World War 1.
The major revenue of US comes from their weapon business. They are the largest weapon seller in the world.
Germany's invasion of Belgium, the sinking of the Lusitania, and the Zimmermann note drew the U.S. into World War 1.
Atomicbomb.
The treacherous Japanese attack on Pearl Harbor on December 7th, 1941 drew the US into the war.
Guns
US
The Japanese bombing of Pearl Harbor.
Bombinmg pearl harbor
Japan
The Zimmerman Telegram and the sinking of the Lusitania-