Jadwiga of Poland
When Jogaila was preparing for the Union of Kreva, Skirgaila was actively involved in the negotiations and even headed a diplomatic mission to Poland. The negotiations succeeded and Jogaila married Jadwiga of Poland and was crowned as King of Poland in 1386. He appointed Skirgaila on 13 March 1386 as governor in Lithuania, not only on his behalf but also on behalf of queen Jadwiga and Polish Crown.