Operation Strangle (World War II)
Operation Strangle was a series of air interdiction operations during the Italian Campaign of World War II by the United States Fifteenth and Twelfth Air Forces to interdict German supply routes in Italy north of Rome from 19 March 1944 to 11 May 1944. Its aim was to prevent essential supplies from reaching German forces in central Italy and compel a German withdrawal. The strategic goal of the air assault was to eliminate or greatly reduce the need for a ground assault on the region. The Allies failed in the overly ambitious objective of the campaign, namely the forced withdrawal of German forces from the Gustav Line, but the air interdiction seriously complicated the German conduct of defensive operations and played a major role in the success of the subsequent Allied ground assault Operation Diadem.
Two principal interdiction lines were maintained across the narrow boot of Italy. This meant that no through trains were able to run from the Po Valley to the front line, and that south of Florence nearly all supplies had to be moved by truck. Over the course of eight weeks, the Allies flew 21,000 sorties (388 per day) and dropped 22,500 tonnes of bombs. The operation employed medium bombers and fighter bombers over a 150-square-mile (390 km2) area from Rome to Pisa and from Pescara to Rimini.
Operation Strangle was also the name of the unsuccessful rail interdiction operation of the United Nations Command air forces in 1951-52 during the Korean War.
Operation Strangle achieved air superiority before the Diadem phase commenced. During Diadem, commanders continued interdicting supply lines but also conducted close air support to maintain air superiority. Some changes in target selection proved to have far-reaching effects on later military doctrine: a partial switch from rail to road targets, coupled with a concentration on the region closest to enemy lines, aimed to cripple the enemy by denying reliable transportation and reducing access to local supplies.
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