krieger
Banned
Aldona Anna, the Queen of Poland died at very young age in 1339. But what if she was as healthy as her later relative, Sigismund I the Old and died in 1392, aged 81? She was fairly young at that time, so it's not impossible that she'd sire Casimir one more kid. Say it's a son, named Vladislaus (after his grandfather Vladislaus I the Elbow-High) and he is born in 1340. It'd be important because I once noticed (in some book written by Lithuanian scholar), that death of Aldona Anna was the one of most important reasons of break-up of Lithuanian-Polish alliance and later War of Galicia. Instead of war, we could achieve a compromise in which young Vladislaus gets whole Bolesław Jerzy inheritance and Lubart doesn't try to claim it from himself (because Gediminas wouldn't want to strip his grandson from his rights) and Galician war wouldn't happen. It means that Poland gets Red Ruthenia without much effort and has a secure succesion. In addition, with Aldona Anna being alive there is no Adelheid of Hesse mumbo-jumbo and no loss of prestige of Polish monarch because of this. @Jan Olbracht