The Sheemore ambush was an ambush carried out by the Irish Republican Army (IRA) on 4 March 1921, during the Irish War of Independence. It took place at Sheemore near Carrick-on-Shannon, County Leitrim. The ambush was carried out by the IRA's South Leitrim Brigade on a British Army and Auxiliary Division convoy. The British force suffered casualties and admitted one fatality, a captain in the Bedfordshire Regiment, although some local sources claimed several more were killed. The Black and Tans later undertook reprisals in Carrick-on-Shannon, including burning the Temperance Hall in Gowel.