Information: - The Headford Ambush took place on 21 March 1921 , during the Irish War of Independence . The Second Kerry Brigade ( South Kerry ) of the Irish Republican Army ( IRA ) ambushed a train carrying British troops at Headford Junction railway station ( near Killarney , County Kerry ) . A total of at least 16 people died in the incident -- 10 British soldiers , 2 IRA volunteers and 4 civilians ( including an informer killed after the ambush ) . - The Irish Republic (or ) was a revolutionary state that declared its independence from Britain in January 1919. In theory the Republic covered the whole island of Ireland, but by 1920 its functional control was limited to only 21 of Ireland's 32 counties, and British state forces maintained presence across much of the north-east, as well as Cork, Dublin and other major towns. - The Irish War of Independence or Anglo-Irish War or the Tan War was a guerrilla war fought from 1919 to 1921 between the Irish Republican Army (IRA, the army of the Irish Republic) and the British security forces in Ireland. It was an escalation of the Irish revolutionary period into armed conflict. What object entity has the relation of 'instance of' with the subject 'headford ambush'? Choices: - army - conflict - island - january - period - republic - revolutionary - security - state - war
conflict