J. F. C. Fuller
John Frederick Charles "Boney" Fuller (1 September 1878 – 10 February 1966) was a senior British Army officer, military historian, and strategist, notable as an early theorist of modern armoured warfare using tanks. He was a highly prolific author whose ideas reached army officers and the interested public, also influencing the development of Blitzkrieg theories in Germany.
After his retirement, Fuller became a member of the British Union of Fascists, was on the party's Policy Directorate, and was considered one of Mosley's closest allies. He was also a stated member of the Nordic League. Although he was not interned or arrested during the war, he was the only officer of his rank not invited to return to service during the war. Fuller spent his last years believing that the wrong side had won the Second World War.