time were shelling the port of Tallinn. Both units were presented to the Estonian Provisional Government and, as Lennuk and Vambola, formed the nucleus of the Estonian Navy. The Estonian Pskov offensive commenced simultaneously on 13 May 1919. Its Petseri Battle Group destroyed the Estonian Red Army, captured the town on 25 May, and cleared the territory between Estonia and the Velikaya River. A few days later, the Northern Corps forces arrived in Pskov. On 19 June 1919, the Estonian Commander-in-Chief Johan Laidoner rescinded his command over the White Russians, and they were renamed the Northwestern Army. Shortly afterward, General Nikolai N. Yudenich took command of the troops. With the front approaching, the garrison of the Krasnaya Gorka fort mutinied. To support the mutiny, a flotilla of British Coastal Motor Boats under the command of Lieutenant Augustus Agar raided Kronstadt Harbour, sinking the cruiser Oleg and the depot ship Pamiat Azova on 17 June 1919. In a second attack in August, the Bolshevik battleships Petropavlovsk and Andrei Pervozvanny were damaged, at the cost of three CMBs. The attackers also managed to sink the important Russian submarine depot ship. Despite the actions, the mutiny was eventually suppressed by the guns of the Bolshevik battleships. The next offensive of the Northwestern Army was planned on 10 July 1919, but the armaments and supplies expected from the Allies did not arrive. Nor did the Estonians desire to proceed with the fruitless war since with the initial peace approach of April 1919 the Russian Bolshevik government already guaranteed the recognition of the independent Estonian state. So when British Gen. Gough requested on 8 August Estonians for the military assistance to Yudenich, Estonians in return asked both Yudenich and the Allies to recognise their state first. Gough's deputy, Brigadier Gen. Frank Marsh required Yudenich to immediately issue a statute that would establish the Government of the North-West Russian Region encompassing Petrograd, Pskov and Novgorod Governorates that would officially guarantee de jure recognition of Estonia. On 16 August Times made the deal public that angered the Foreign Office and the War Cabinet, and caused a decline in further military aid to Yudenich. However, the Northwestern Army launched operation White Sword, the last major effort to capture Petrograd on 9 October, with arms provided by Britain and France, and the operational support by the Estonian Army, Estonian Navy, and the Royal Navy. Securing Petrograd for the White