Other way to stop the supplies reaching Rommel:

A blow against Rommel In November 1942, 180kg (400lb) of plastic explosive was used by an SOE team, aided by Greek partisans, to blow up the Gorgopotamos bridge on Greece's Salonika-Athens railway. This had been carrying vital supplies for Rommel's Afrika Korps in the desert war against the British 8th Army.

http://www.channel4.com/history/micr...ion/cross.html

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