Question: What Canadian Director of Military Operations and Intelligence also served as a senior staff officer in the Canadian Expeditionary Force (CEF)?
Sentence (from "James Sutherland Brown"): James "Buster" Sutherland Brown {'1': ", '2': ", '3': ", '4': "} (June 28, 1881 – April 14, 1951) was a Canadian military officer best known for drafting a contingency war plan in 1921 to invade and occupy several American border cities.
Relevant evidence: No