After 07 Dec 1941
If the question refers to US TROOPS only, the number is 16 million, 353 thousand. allied troups
No, but they did send ships and planes.
Smallpox originated in "the Old World" (Eurasia and Africa) and was brought to "the New World" (the Americas) by Europeans. So, basically, no. US troops didn't "bring smallpox to Europe" because it was already there.
Brazil did send a division in World War II. It was equipped by the US and served in Italy.
Britain and France
They have troops in 135 countries
yes
December 8th, 1941.
2 million 2 million
lend lease.
There was almost no fighting in Germany in World War 1, except in East Prussia in August-September, 1914.
When the US entered World War II in 1941, its strategy was to send most of its troops to the Pacific to battle Japanese forces. Later, from 1943-1945 the US led the allied war effort in Europe.