Seán MacMahon was an Irish nationalist who fought in the 1916 rising. He took the pro-treaty side in the Irish Civil War (1922–23) and rose to be chief of staff of the Irish Defence Forces
MacMahon in Irish Army uniform
Sean Mac Mahon Bridge in Grand Canal Dock, Dublin City.
Frongoch internment camp at Frongoch in Merionethshire, Wales was a makeshift place of imprisonment during the First World War and the 1916 Easter Rising.
Marker stone and plaque at Frongoch on the side of the A4212 road
Frongoch prisoners of war from the Easter Rising of Ireland