Question

What was disrupting the flow of supplies and soldiers to Britain in 1942?

Answer 1

German U-boats and fighter planes. The Germans were the first country to actually make a submarine and they had some of the fastest fighter planes at this time. Therefore any supplies could easily been destroyed by the Germans by air or water

Answer 2

Since the Battle of the Atlantic was going on at the time German Submarines would destroy British ships in order to prevent Britain from receiving supplies.