Complex sentence: There followed a period of hostile patrolling and skirmishing on the XIII Corps front while the main burden of the fighting was assumed by V Corps as the Canadians pushed for Ortona with the Indian Division on their left flank attacking towards Villa Grande and Tollo.
Split into simpler sentences: There followed a period of hostile patrolling and skirmishing on the XIII Corps front. The main burden of the fighting was therefore assumed by V Corps as the Canadians pushed for Ortona with the Indian Division on their left flank attacking towards Villa Grande and Tollo.