On a 1 the Axis capture all the lend lease. That’s why we spread out the lend lease between 3 empires. One time Russia got 50 IPC from the US because Moscow was in danger and the Axis would have won because Russia couldn’t have taken it back and it would give the 12th victory city needed. Russia got all 50 IPC and the Axis lost, but it was a big gamble. They bought a fortress for 2 turns and max infantry and had 30+ units. You can only make things so realistic when you turn 20,000 soldiers into a 12 sided dice. It’s not very realistic but it’s fun.
The best part of this game is war entry and lend lease in my opinion. Japan and UK are the most fun to play because they have the most options.
I forgot to say that UK takes every neutral they can in Africa and South America that is free and open unless it causes their other territories to become Pro Allied to the Axis (like Portugal). This is another 10 -15 ipc per turn around turn 4. Two infantry can walk around over half of S.A. and take it without casualties. Not very realistic but the rules allow it.