sentences:  He attended the local national school and was taught Irish language and history by Cormac Breathnach who also taught several other local students who would become prominent in the nationalist movement including Seán Treacy, Dan Breen and Dinny Lacey.Hogan's father died in 1916.Seán joined the local Volunteers and was a member of the Donohill company of the Tipperary Third Brigade.