O'Connor was born in Poulawaddra, Farmer's Bridge near
Tralee,
County Kerry, in July 1899. He left school at 15, and not long afterwards joined the
Irish Volunteers, a military organisation who sought to oppose the
Ulster Volunteers if they attempted to resist an All-Ireland parliament upon the implementation of
Home Rule in Ireland. During the
Irish War of Independence he joined the No. 1 Brigade of the Kerry
Irish Republican Army, before later transferring to a
Flying column in Kerry Brigade No.2, serving under Dan Allman. During this time he became an associate of future
Fianna Fáil TD
Tom McEllistrim. O'Connor was reputedly a skilled operator of a
Lewis Machine Gun, earning him the moniker of "Machine Gun Connor". When the
Irish Civil War broke out, O'Connor took the
Anti-Treaty IRA side. In 1923, he was captured by
Pro-Treaty forces and imprisoned. Following his release from prison, O'Connor emigrated to
Chicago until 1930, when he returned to Kerry to take over his family's farm. In February 1933, Connor was charged with weapons possession in Tralee Court and made the following statement: "As a soldier of the Irish Republican Army I refuse to recognise the jurisdiction of this court." In 1929, he married Margaret Corkery. During
the Emergency (the era by the which
World War II was referred to in Ireland), he was once again jailed (February 1941) with Jim Crofton on charges of still being active in the IRA, this time by a Fianna Fáil government. During this time he was in the company of others charged with the same crime and became politically interested. Following his release, he joined
Clann na Poblachta, which had strong IRA links and was led by former IRA Chief-of-Staff
Seán MacBride. ==Politician==