[7] Broy supported the Anglo-Irish Treaty of 1921 and joined the National Army during the Irish Civil War, reaching the rank of colonel.

They shot dead a protesting farmer called Lynch in Cork, and when the matter was discussed in the Senate in 1934, the members who supported Éamon de Valera's government walked out.

In the light of this latter history, their name is often used in reference to individuals or groups who attempt to disrupt contemporary Dissident Republicans, such as the remnants of the Provisional IRA.

[17] Neil Jordan's film Michael Collins (1996) inaccurately depicts Broy (played by actor Stephen Rea) as having been arrested, tortured and killed by SIS agents.

[18] Broy is also mentioned and makes an appearance in Michael Russell's detective novel The City of Shadows, set partly in Dublin in the 1930s, published by HarperCollins in 2012.