This was followed by an extended Change_event_time campaign Military_operation through Russia culminating Process_end in the long and difficult siege Besieging of Pskov .

In the aftermath of this reverse Change , the Swedes recaptured Conquering much of Ingria , took Conquering the Pskov Monastery of the Caves and inflicted Causation a heavy defeat Conquering on the Russian general Matvey Sheremetev at Valga in 1657 .