How did american troops turn the tide of the war on the battlefield?

I will assume this is a question that you need to type something. DO NOT COPY AND PASTE. Thats how you get caught. America did many things, we gave weapons to Great Britain, and we had a massive machine of a contry that could pump out weapons of mass destruction quickly.

D-Day, Giving weapons to great britten, and not giving up on the path to destroy nazis

In my honest opinion , i’d say franklin d roosevelt was a president that impacted our nation , i say this because fdr is voted among top three best us presidents and he was the longest serving president by 3 terms , usually presidents only supposed to have two terms increments of 4 years , equivalent to 8 years total before election time. and he established the fdic , through the 1933 banking act and he established the us , social security system , during his presidency, and established a national minimum wage , through the fair labor standards act , fdr led the allied coalition to victory in wwii and he played a major role in the creation of the united nations.