Swedish - PLC war broke out after Sigismund III Vasa annexed Estonia (he was both Swedish and Polish King). Sieges and pillaging villages was part of every war back then and it was Sweden who invaded lol. They also spreaded conflict to lands that was belonging for centuries to PLC, Lithuania or theirs vassals. 20 years later Swedes invaded again and slaughtered 1/3 of entire population of the kingdom!