Field Marshal Sir Henry Hughes Wilson, 1st Baronet, GCB, DSO, one of the most senior British Army staff officers of World War I and briefly an Irish unionist politician, is born at Currygrane in Ballinalee, County Longford on May 5, 1864.
Wilson attends Marlborough public school between September 1877 and Easter 1880, before leaving for a crammer to prepare for the Army.
Wilson serves as Commandant of the Staff College, Camberley, and then as Director of Military Operations at the War Office, in which post he plays a vital role in drawing up plans to deploy an Expeditionary Force to France in the event of war. During these years he acquires a reputation as a political intriguer for his role in agitating for the introduction of conscription and in the Curragh incident of 1914, when he encourages senior officers to resign rather than move against the Ulster Volunteers.
As Sub Chief of Staff to the British Expeditionary Force (BEF), Wilson is John French‘s most important adviser during the 1914 campaign, but his poor relations with Douglas Haig and William Robertson see him sidelined from top decision-making in the middle years of the war. He plays an important role in Anglo-French military relations in 1915 and, after his only experience of field command as a corps commander in 1916, again as an ally of the controversial French General Robert Nivelle in early 1917. Later in 1917 he is informal military advisor to British Prime Minister David Lloyd George, and then British Permanent Military Representative at the Supreme War Council at Versailles.
In 1918 Wilson serves as Chief of the Imperial General Staff, the professional head of the British Army. He continues to hold this position after the war, a time when the Army is being sharply reduced in size whilst attempting to contain industrial unrest in the UK and nationalist unrest in Mesopotamia, Iraq and Egypt. He also plays an important role in the Irish War of Independence.
After retiring from the army Wilson serves briefly as a Member of Parliament, and also as security advisor to the Government of Northern Ireland. He is assassinated on his own doorstep by two Irish Republican Army (IRA) gunmen on June 22, 1922 while returning home from unveiling the Great Eastern Railway War Memorial at Liverpool Street station.