半绯江山:1253 Lithuanian tribes unified
1264 Statute of Kalisz (Poland declared tolerance for Jews)
1385 Union of Krewko
1410 Battle of Grunwald (against Teutonic Knights, mostly Prussians. They'd been attacking and enslaving Lithuanians for centuries since they were Pagan, and Poland had a territorial dispute with them.)
1411 Peace of Thorn (in which Poland pleads the Holy Roman Empire to allow the Lithuanians to be "baptised with water, not with blood" under Polish influence. HRE approves, and calls off the Teutonic Knitghts.)
1468 Casimir's Code adopted