Brigadier-General Percy Robert Clifford Groves, (26 May 1878 – 12 August 1959) was a senior British air strategist who served in the British Army and the Royal Air Force (RAF).
He was a tireless campaigner for a radical rethink of Britain's approach to air strategy following the First World War, in particular for an immediate expansion of the RAF to parity with the largest European force within striking distance.
He is perhaps best known as being an advocate of the aerial ‘’knock out blow’’: the possibility of ending a war in its early stages by launching a massive attack on the enemy’s centres of gravity.