Alexios Komnenos dying at the Battle of Durazzo in 1081, opening up even more space for the Normans, Pechenegs, and Seljuq Turks to carve up the collapsing post-Manzikert Byzantine Empire.
Pritviraj Chauhan, Raja of Ajmer, actively pursuing and killing Muhammad of Ghor after the First Battle of Tarain in 1191. Muslim expansion into northern India could be delayed for a long time, and Chauhan could form a Rajput confederation (later empire?) of sorts, expanding into Kashmir, eastern Afghanistan, and Balochistan.