Complex sentence: It was re-assigned to the Highland's Department on 13 March 1777 and on 12 June 1777 it was assigned to 2d Massachusetts Brigadeand three days later, 15 June 1777 it was re-assigned to the 1st Massachusetts Brigade.
Split into simpler sentences: It was re-assigned to the Highland's Department on 13 March 1777. On 12 June 1777 it was assigned to 2nd Massachusetts Brigade and three days later, 15 June 1777, it was re-assigned to the 1st Massachusetts Brigade.