members of the West Limerick Brigade became suspicious and when he moved to Kerry they sent word to monitor him. He was arrested in Kerry and brought back to Limerick for trial. Hogan knew the real Peadar Clancy, who was executed later in the year by the British in Dublin Castle. It was discovered that the person's real name was John Crowley who had been on the trail of Hogan, Treacy and Breen. Crowley was identified by Hogan and executed by the West Limerick Brigade as a spy. Back in Tipperary Hogan returned full-time to Tipperary in the middle of 1920, initially serving as a Brigade Officer. He was tasked by Brigade HQ with reorganizing the activities of 6th and 7th battalions and was made interim O/C of the 6th Battalion, as the previous O/C Ed McGrath had been imprisoned. In September 1920, Hogan and Seán Treacy travelled to Dublin for a meeting with GHQ on the formation of Flying Columns. After the meeting Hogan returned to Tipperary, but Treacy remained in Dublin and was killed in action the following month. In December 1920, Hogan was made O/C of the Brigade's 2nd Flying Column. Jack Nagle was Vice O/C and Maurice McGrath was the Flying Column's Adjutant. Dan Breen, who was recuperating from the wounds he received at Drumconda, stayed with the column for a number of weeks while it was being established and assisted Hogan with its formation and training. The column became active in January 1921 and operated mainly in the Southern part of the Brigade area. The column also undertook activities in Kilkenny and North Cork Truce and Civil War During the early part of the truce period Hogan was based mainly in Dublin, although he travelled to the North of the country to assist with the training of Brigades there, including assisting at an IRA training camp at Sperrin, Co. Tyrone with Dan Breen. In December 1921, disheartened by the terms of the treaty, he traveled to the US with Dan Breen. In March 1922 republican leader Liam Lynch requested they return to Ireland as the tensions between those who supported and were against the treaty were rising. Breen and Hogan arrived back in Ireland in April 1922. After the fall of the Four Courts and Dublin to the Free State army at the start of the Irish Civil War, Hogan returned to the East Limerick/South