Complex sentence: In early March the heavily battered 56th Division was relieved by the 5th Division, with Lyne's 169th Brigade being relieved by the 13th Brigade and intending to return to Egypt for rest and retraining.
Split into simpler sentences: In early March the heavily battered 56th Division was relieved by the 5th Division, with Lyne's 169th Brigade being relieved by the 13th Brigade. The intention was to return to Egypt for rest and retraining.