Daniel wore a papal crown while pledging to the Golden Horde
Roman the Great fused Galicia and Volhynia around 1199; after Mongol storms of 1239–1241, Daniel of Galicia swore to Batu Khan in 1246 yet took a royal crown in 1253. The Kingdom of Ruthenia lasted until Poland's Casimir III annexed Galicia in 1349.
Territory sat mostly in today's Ukraine with slices of Belarus, Poland, and neighbouring lands. Volhynia's princely roots may reach the late tenth century; Galicia coalesced in 1124–1144 when Vladimirko united Zvenyhorod, Peremyshl, and Terebovlia. Mongol devastation forced Rus' princes into Horde allegiance even as Western recognition offered Daniel kingship.
Polish annexation in 1349 let Casimir style himself King of Poland and Ruthenia; by 1434 the land was the Ruthenian Voivodeship, with remaining legal autonomy gone by 1506. Volhynia drifted under other neighbours' orbits. The dual loyalty—steppe overlord and Latin crown—captures thirteenth-century Eastern Europe's squeeze between empires.
The union was born of a vacancy. Vladimir II Yaroslavich, the last prince of Galicia, died in 1198 or 1199 without a recognised heir on his father's side, and the Galician boyars invited Roman in; Halych and Volodymyr became his chief cities. Roman allied with Poland, made peace with Hungary and cultivated Byzantium, but the Polish alliance collapsed in 1205 and he was killed at the Battle of Zawichost, opening almost forty years of rebellion. The boyars drove out his widow Anna-Euphrosyne and his sons Daniel and Vasylko, and from 1206 to 1212 three sons of Igor Svyatoslavich held Galicia. The brothers finally beat Polish and Hungarian forces at Yaroslavl on 17 August 1245. Daniel then travelled to Batu at Sarai, rebuilt his army on Mongol lines with Mongol weapons, and took a crown sanctioned by Pope Innocent IV, while complaining that he had hoped for an army rather than a title. His reign is remembered as a golden age, one that produced the Galician–Volhynian Chronicle.
Source: Kingdom of Galicia–Volhynia
