In 1715 William Mackenzie, 5th Earl of Seaforth led a force of 3000 men headed by the Clan Mackenzie which also included men from the Clan MacDonald, Clan MacKinnon, Clan MacRae and the Clan Chisholm. He was opposed by Robert's eldest son and heir, Colonel Sir Robert Munro of Foulis who had formed a camp at the Bridge of Alness with 600 men which also included men from the Clan Ross. Munro had sent many of his own men south to protect the lands of the Clan Forbes of Culloden from the Jacobites. Munro was soon joined by the Earl of Sutherland and the Chief of Clan Mackay who both brought with them only a portion of their clans and expected support from the Clan Grant did not arrive. The Earl of Seaforth's forces advanced on the Sutherland's camp who made a quick retreat to avoid contact with their more powerful foe. Soon afterwards a council of war was held between the two sides and the Sutherlanders and Mackays peacefully moved back north to their own territory, while much of the Ross's lands were ravaged and the Munros returned home to find their lands of Ferindonald and Foulis Castle had been plundered. The Sutherlanders and the Munros were not long in retaliating. Sir Robert Munro of Foulis and the Earl of Sutherland gathered their forces and spoiled MacKenzie, Earl of Seaforth's lands of Brahan. From Major Fraser's manuscript: The Earl of Sutherland that night, to be avenged on what was done to him at Alness, and the Munros, also to be revenged of what the MacKenzies and MacDonalds had plundered from them, did encamp near Lord Seaforth's house and there destroy what they could. Then a hundred Frasers and a hundred Munros were sent off to bring in provisions, there being 1500 men encamped that night, and every two men might have had a cow. Being about 400 cows and 200 sheep brought from the mountains.
Although blind, Robert was an able and intelligent man and was appointed by King George I the Sheriff of Ross, by commission, under the great seal, dated 9 June 1725. During the risings of 1715 and 1719 his clan had done much to check the activities of the Mackenzies and other Jacobite clans. During Robert's lifetime his eldest son, Col. Robert helped bring to an end the Siege of Inverness and his second son, Cpt. George Munro of Culcairn led men of the clan at the Battle of Glenshiel where they defeated the Jacobites in June 1719. Robert Munro died in 1729, he had married Jean Forbes, the daughter of John Forbes of Culloden, chief of Clan Forbes, they had four children:
