[IronDuke99]

Had I been in Churchill's position when Hitler invaded Russia, I would not have risked one single British ship or sent Stalin as much as a second hand pair of British Army boots while British forces in the Far East (Malaya and Burma) lacked tanks and modern aircraft.

In the event the vast amount of British and American military aid sent to Russia that cost the western allies -mainly UK- dear in warships and merchant ships, did very little to stop the German onslaught into the then USSR IN 1941-43, but did allow Stalin's forces, by giving them transport, to romp into Europe in 1944-45.

A book I recommend is "The Last Thousand Days of the British Empire" by Peter Clarke (2008). I do not agree with all of it, but it makes a lot of very good points from a British point of view.