Warsaw airlift
The Warsaw airlift or Warsaw air bridge was a British-led operation to re-supply the besieged Polish resistance Home Army (AK) in the Warsaw Uprising against Nazi Germany during the Second World War, after nearby Soviet forces chose not to come to its aid. It took place between 4 August and 28 September 1944 and was conducted by Polish, British, Canadian, Australian, New Zealand and South African airmen flying from Celone and Brindisi in Italy and was denied flyover rights from their Soviet allies, who shot at them when the planes entered Soviet airspace. On 18 September, in the final stages of the Nazis crushing the uprising, one United States airdrop was launched from Great Britain and landed at Poltava in Soviet Ukraine as the distance to the drop-zone precluded the aircraft returning to base. The flights from Italy were night operations with low level cargo drops, conducted without fighter escort while the single United States Army Air Forces mission of 18 September 1944 was a high-altitude, daylight operation consisting of 107 B-17s protected by P-51 fighters. From the night of 13/14 September, Soviet aircraft flew some supply drops, dropping about 130 tons in total until 27/28 September. Initially, this cargo was dropped without parachutes, resulting in much of the payload being damaged or destroyed.
Source: Wikipedia
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