Complex sentence: Canadian units of the War of 1812 played an instrumental role during the conflict and the history, heritage as well as the War of 1812 Battle Honours awarded to many of these units are perpetuated by current units within the Canadian Army.
Split into simpler sentences: Canadian units of the War of 1812 played an instrumental role during the conflict. The history and heritage, as well as the War of 1812 Battle Honours awarded to many of these units, are perpetuated by current units within the Canadian Army.