Dunoon the popularity of overseas travel increased. In 1961, during the height of the Cold War, Dunoon became a garrison town to the United States Navy. In 1992, they closed their Holy Loch base, and Dunoon suffered an economic downturn. Since the base's closure, the town and surrounding area are again turning to tourism, marketing to outdoor enthusiasts and wildlife lovers as well as promoting festivals and competitions. The largest annual event held in the town is the Cowal Highland Gathering. The Royal National Mòd has been held in the town seven times and in 2018 will again be held at
Cowal in the 19th century, the traditional provinces were formally abolished, in favour of counties aligned with sheriffdoms, so Cowal became merely a part of the county of Argyll. The history of the Cowal is tied into the clans who inhabited it. Seemingly, in the 11th century, an unidentified heiress of the Cenel Comgaill married Anrothan, grandson of the king of the Cenél nEógain, from Ulster. Clan traditions argue that Anrothan's lands were passed down to a descendant named Aodha Alainn O'Neil, who had the following sons: Excavations carried out at Castle MacEwen showed the site had several stages of development