As Russia had no full-fledged navy to intercept reinforcements coming to the Swedish garrison across the Baltic, Riga managed to hold out until October, when foreign officers commanding a small Russian flotilla defected to the other side and the Russians had to lift the siege. In the aftermath of this reverse, the Swedes recaptured much of Ingria, took the Pskov Monastery of the Caves and inflicted a defeat on the Russian general Matvey Sheremetev at Walk (Valga) in 1657, but were eventually defeated by another Russian general, Ivan Khovansky, at Gdov, on 16 September 1657.