On August 22.1922, during the Irish Civil War, Michael Collins, chairman of the Provisional Government and Commander-in-chief of the national army, was killed in an ambush here by anti-Treaty IRA forces while traveling in convoy towards Bandon. The ambush was planned on a farm in Béal na Bláth near The Diamond Bar.  The commemoration is held on the nearest Sunday to the anniversary of his death. A memorial stands at the site of the shooting of a local road 1 km south of the village which was a dirt road when Collins was shot. A small white cross marks the spot where he fell.
The original version of the village’s name has been obscured by the passage of time. The spelling Béal na Bláth (translated as “mouth of the flowers / flowers”) is widely used, but this does not spell the placename spoken by the last native Irish language in the area (which survived until the 1940s). This version of the name, and the associated translation, probably arose from folk etymology among other speakers. 
A proposed reconstruction of the original name is Béal Átha na Bláiche , which means “mouth of the ford of the core”, by analogy with a similar place name in County Limerick; Another version is attested in the literature is Béal na Bláth (Anglicized as Bealnablath ) that can either mean “mouth flower” or “mouth of buttermilk.”  As of 2012, believes the Irish placental Commission Béal na BLA to be the most accurate version of the original placename. The meaning of “blah” is unclear in this context, but it can mean “green” or “lawn”. 
- ^ Jump up to: a b placental Database of Ireland. Accessed August 16, 2012
- Jump up ^ Hopkinson, Michael. 1988. Green to Green: the Irish Civil War. The 177th
- ^ Jump up to: a b Ó hÚrdail, Roibeard (1999), “The Place Name Béal na blah”, Journal of Cork Historical and Archaeological Society, 104 : 111-116