WW1 - The US finally arrived four years into the war.Without US help in WW1 Britain would have lost.
Without US help in WW2 Britain would not only have lost but would now have a German govt.
In 1914 Britain had the worlds largest empire.
After both world wars in the 1960s Britain had lost its empire entirely and the USA had gained dominance.
Germany has surged forward economically whilst Britain languishes in a sea of Brexit uncertainty and woeful leadership.
So yes, technically Britain beat Germany in both world wars but it was a hollow Pyrhic like victory and the outcome now on points out of ten for
Britain is only four but Germany easily gets a seven.
WW2 - The US didn't fight in Europe until 1943 - four years into the war.
Looks like brave Britain survived without them, pal.