M1 Garand: Standard-issue rifle. It was the official weapon of the US Marines during WWII.
M2 Thompson: The "Tommy Gun" was a submachine gun used by paratroopers because of it's effectiveness in close combat and its small size.
M1/M1A1 Carbine: Like the Thompson, the M1 Carbine was used as a paratrooper rifle because of its small size and large ammunition capacity (an average M1 Carbine could hold 15 rounds).
BAR: The BAR was used in WWI as well. It was a standard-issue, light machine gun used by demolition crews.
Browning M1919 HMG: The Browning M1919 was used in WWI, but saw little use. It was used on tanks, airplanes--pretty much anything the US could fit it on, including infantry with good muscles!
Springfield M1903: The Springfield was soon replaced by the M1 Garand, because it had the same power, but the Springfield was bolt-action, as the Garand was automatic.
M2 Flamethrower: The M2 Flamethrower was the common infantry flamethrower of the Pacific Theater, although it was available by special request in Europe. Since the Japanese would usually hide in caves to keep themselves safe from naval artillery, US troops would shoot a stream of fire into caves to either burn them out, or the fire would use up oxygen and the Japanese would suffocate.
You need to tell us which war.
You can't fight a war without weapons.
Atomic weapons negate declarations of war.
how the us provided the people and weapons to fight the war Uh! rubbish answer
Supplying Allies with weapons
The foreign weapons policy.
Atomic and nuclear weapons.
Their goal was to have the most powerful weapons in the world, but US intervened and the war became known as the Cold war
Europe needed help and weapons
From supplying the weapons of war to becoming the primary combatant.
It is going to be very difficult to find any information on the US testing chemical weapons on US soldiers during World War II (2). The best thing to do to find more info is to find World War II survivors and interview them.
The US got a lot of money. The Allied Forces bought a lot of their war-time weapons and munitions.