 In the summer of 1594, Donald Gorm Mor Macdonald of Sleat and Ruariri Mor Macleod of Harris and Dunvegan each sailed for Ulster at the head of 500 men each.They force was intended to support Hugh O'Donnell who was besieging Enniskillen Castle.Later in 1595 another expedition of Hebredians was made to support the Irish rebels against the forces of Elizabeth I. Donald Gorm Mor of Sleat raised a fighting force of 4,000 men and sailed to Ulster in a fleet of 50 galleys and 70 supply ships.