Having served as proctor for about a month, Sankey returned to military service and went as a commander to Ireland where "he did good service". In a short time was made colonel of a regiment of horse, with £474 per annum for his salary, besides other advantages. He was also rebaptised as an
anabaptist when he went into Ireland. In 1651 and 1652 he was commander in chief of the parliament forces in the county of Tipperary, where, according to members of his party, "he did excellent service for the cause, being then a thorough-paced anabaptist". Sankey's letter of 26 March 1652 from Clonmell, and the Articles of agreement between him and the Council of War for the Parliament, and Colonel
Edmund O'Dwyer, Commander in Chief of the Irish Brigades made on 23 March 1652, were read in parliament on 8 April 1652. It was resolved that a letter be written to be signed by Mr. Speaker taking notice of the good service of Sankey and giving him the thanks of Parliament. Bills were made for settling lands in Ireland £200 a year on him and his heirs. In 1654, he was a member of parliament for the counties of Tipperary and Waterford in the
First Protectorate Parliament. ==Parliamentary career==