And my potted view of American arms?
The tremendous and largely useless losses caused by the civil war shocked America.
Mass production enabled America to produce good quality munitions in quantity.
In WWI, remembering the civil war, they did not want to get involved. Involved they got and used their industrial muscle to break the stalemate and swing the balance.
In WWII ditto. Producing merchant ships in 14 days and Sherman tanks like car production all helped provide massive technological mass. At Anzio they managed to land one vehicle for every 4 men.
For WWIII the US again turned to technology and produced war winning equipment albeit not in numbers to match the USSR.
In GW1/2 their kit was superb.
I am not commenting on their skill at arms but at their technology driven approach to 'make the other dumb bastard die for his country.'