The United States tried very hard not to be involved in the war. At first all they did was help out their allies with food and other supplies. They didn't actively join the war until December 7, 1941 when Japan bombed pearl harbor. They officially declared war against Japan and soon after Germany.
Question- What did General McClellan’s Army of the Potomac try to achieve with the Peninsula Campaign?
Answer- General George McClellan was a leading Union commander in 1862 when he built and then led the Army of the Potomac in an attempt to capture Richmond, Virginia, which resulted in the Peninsula Campaign, stretching from March to August, 1862.
Its a federal law intended to check the president's power<span> to commit the United States to an armed conflict without the consent of the U.S. Congress.</span>
I don't actually know this. But, I think that it was Lincoln. Then the Amenstapation proclamation was created. BTW, I probably spelt Amenstapation wrong.