Lend Lease to Russia - World at War
2013-8-27u2002·u2002round-trip voyage for a U-Boat was 90 days—meant no sustained campaign could be kept up, and there was never any serious disruption of the route. At most the Germans were able to interdict only about four percent of the supplies sent via the southern route. Arctic Convoy Battles By far the most dramatic and most dangerous route for shipping
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