another clueless historian wannabe who's talking gobbledygook thru' his arse. again.
let's use attack on pearl harbor by the japs as a reference point, i.e. u.s. entered the war. december 7, 1941.
battle of moscow - october 1941 to january 1942. counter offensive by soviets pushed back germans and almost surrounded 3 german armies. although the u.s. were supplying the soviets via convoys to the port of murmansk before entry in the war, u.s. supplies and arms had little to no material effect on the battle of moscow due to the relatively short duration and early end of the battle on january 7, 1942.
battle and siege of leningrad - september 1941 to january 1944. soviet defenders were isolated and held out in leningrad against all odds for over 2 years. the siege was lifted when soviet forces from the east pushed back german and finnish armies to the bay of vyborg and vuoksi river.
battle of stalingrad - august 1942 to february 1943. although august 1942 was 8 months after pearl harbor, the amount of men, machines and material assembled around stalingrad by the soviets were mostly of soviet origin, especially all the soldiers, including soviet women near the front and in thousands of factories that were moved further eastwards. any material aid by the u.s. were overhyped. in fact, the u.s. were not doing well against the japs in the pacific 6 months into the war. it was only in june 1942 that the tide in the pacific turned at the battle of midway. the u.s. was locked in life or death battles with the japs for most of 1942 until mid 1943 when up to 24 essex class aircraft carriers started to come off shipyards by the shiploads. at one time in 1943, the u.s. had only 1 carrier operational in the pacific. the soviets were alone fighting the germans and finnish on continental europe in 1942 and 1943, prior to the allied invasion of italy. even without d-day, june 1944, in normandy with a 2nd front in western europe, the soviets could have taken on the germans one on one after stalingrad, and won the war on her own, albeit with a much delayed victory. the normandy allied invasion was the west desperate attempt to save part of germany and western europe from total soviet domination.
go read up before you spew your nonsense.