In World War I, USA helped Britain in the war however they joined in the war 1917 and didn't involve a lot that was part of the reason why they didn't want to punish Germany after World War I. They helped by supplying troops and armies.
The US and the Allies won World War 2.
To help allies and establish stable economy and political conditions
The US joined the war on the side of the Allies on April 6, 1917.
It provided the food, guns, planes, ships, medicines etc to win the war
The Lend-Lease Act .
Well they did have Allies because back in world war 1 they asked us and we agreed so then we help them fight the Germans and we would've some say they would of lost the war if we didn't help them
The allied side. The assassination of Archduke Franz Ferdinand sparked a war causing Austria and its allies to declare war on Serbia and Russia. Soon, the allies of Serbia and Russia declared war on Austria. Then, when Great Britain and France declared war, the US wanted to help their allies, causing them to join the allies.
japan and Italy
Allies
Allies.
allies
Allies