the 1st Destroyer Flotilla of the Home Fleet. She remained part of the 1st Flotilla until 1913, when she transferred to the 4th Destroyer Flotilla, based at Portsmouth. In October that year, the Tribals were officially designated the F class, and as such the letter "F" was painted on the bows of the class. In February 1914, the Tribals (including Mohawk), whose range was too short for effective open sea operations, were sent to Dover, forming the 6th Destroyer Flotilla. On the outbreak of the First World War the 6th Flotilla formed the basis of the Dover Patrol. An early duty was escorting the ships carrying the British Expeditionary Force to France. A German submarine attempted to attack Mohawk on 6 October, but the destroyer and the ships she was escorting were unharmed. On 1 June 1915 Mohawk encountered a minefield laid by at the southern entrance to the Downs. Several mines were spotted close to Mohawk which struck one. Five of Mohawks crew were killed, and Mohawk was towed back to Dover with her decks almost awash. On the night of 26/27 October 1916, German torpedo boats of their Flanders Flotilla carried out a large scale raid into the English Channel, hoping to attack the drifters watching the anti-submarine nets of the Dover Barrage, and to sink Allied shipping in the Channel. Mohawk was one of six Tribal-class destroyers waiting at readiness in Dover harbour, and when the Germans attacked the drifters and sank the supporting destroyer , they were ordered to intervene. The destroyers split up as they left Dover harbour, with leading Mohawk and from the Western entrance to the port, while the other three destroyers (, and ) left by the other entrance and failed to join up with Vikings group. Nubian and Amazon separately ran into the German 17th Half Flotilla, with Nubian first being badly damaged by a torpedo and Amazon then heavily hit by German shells. The group led by Viking then encountered another German formation, the 18th Half Flotilla. German shells killed four aboard Mohawk and caused her steering to jam, blocking the course of Viking when she attempted to pursue the German torpedo boats, that escaped unharmed. Mohawk remained with the 6th Flotilla until 3 October 1917, joining the 10th Submarine Flotilla. Mohawk remained part of the 10th Submarine Flotilla at the end of the war on 11 November 1918. She