 Working in co-operation with each other, the two Macdonald chiefs invaded Coll, Mull and Tiree, laying waste to the islands, and Donald returned to Castle Tioram with his galleys full of spoil.Lachlan Mor was at first unable to retaliate, but his time soon came.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.