Question: Field Marshal Alan Francis Brooke, 1st Viscount Alanbrooke, & Bar, was a senior officer of the British Army, As chairman of the Chiefs of Staff Committee, Brooke was the foremost military advisor to which British Prime Minister, and had the role of co-ordinator of the British military efforts in the Allies' victory in 1945, who was this British statesman, army officer, and writer?
Sentence (from "Winston Churchill"): He led the Conservative Party for fifteen years from 1940 to 1955.
Relevant evidence: No