Complex sentence: The commandos outfit themselves as Polish troops, as few of them speak English, and plan to infiltrate Studley Constable, complete their mission, rendezvous with an E-boat on the nearby coast and make their escape.
Split into simpler sentences: The commandos outfit themselves as Polish troops, as few of them speak English. The plan is to infiltrate Studley Constable, complete their mission, rendezvous with an E-boat on the nearby coast and make their escape.