Ms diary notes, August 1916 - March 1925, relating to his service as a subaltern with the 6th Battalion The King's Own (Royal Lancashire Regiment) (38th Brigade, 13th Division) in Mesopotamia until December 1916, his evacuation with wounds to India, his attachment from August 1918 to the Machine Gun Corps in India, and from May 1920 to the Royal Tank Corps in Egypt and Palestine, transfer to the RTC in September 1923 and service as an instructor at the RTC School in Ahmednagar, India until September 1925. The majority of the collection consists of personal and official war diaries, correspondence and memoranda relating to Briggs' career during the Second World War, initially as GSO1 on the staff of GHQ, BEF during May - June 1940, when he travelled to Rouen to convey instructions to the relieving force of 1st Armoured Division, but after a brief period of service as GSO1 Home Forces, as commander of the 2nd Armoured Brigade, December 1941 - April 1942, and 1st Armoured Division, April 1942 - July 1943, both of which were operating in the Western Desert as part of the Eighth Army, involved in the Battles of Knightsbridge (May - June 1942), El Alamein (October - November 1942) and El Hamma, part of the battle for the Mareth Line (March 1943). The collection also includes papers relating to St George's Church, Ypres and the British community living in the Ypres Salient of Belgium, the Salute the Soldier fund-raising events held during 1944, and correspondence between Briggs and General Sir Ian Hamilton, Lieutenant General Sir James Marshall-Cornwall, Sir Basil Liddell-Hart, and Lieutenant General Sir Francis Tuker.
Military conflict took place during every year of the 20th Century. There were only short periods of time that the world was free of war. The total number of deaths caused by war during the 20th Century has been estimated at 187 million and is probably higher.