ハールィチ・ヴォルィーニ大公国はなぜ滅亡した
Danylo's dynasty attempted to gain support from Pope Benedict XII and broader European powers for an alliance against the Mongols, but ultimately proved unable to compete with the rising powers of the centralised Grand Duchy of Lithuania and the Kingdom of Poland. Only in 1349, after the occupation of Galicia–Volhynia by an allied Polish-Hungarian force, was the Kingdom of Galicia–Volhynia finally conquered and incorporated in Poland. This ended the vassalage of Galicia–Volhynia Rus' to the Golden Horde.
conquered and incorporated