The Canadian Cavalry Brigade was raised in December 1914, under it first commanding officer Brigadier-General J.E.B. Seely. It was originally composed of two Canadian and one British regiments and an attached artillery battery. The Canadian units were the Royal Canadian Dragoons, Lord Strathcona's Horse (Royal Canadians) and the Royal Canadian Horse Artillery battery. The British regiment was the King Edward's Horse (The King's Overseas Dominions Regiment).