The promises included the adoption of Christianity, repatriation of lands "stolen" from Poland by its neighbours, and terras suas Lithuaniae et Russiae Coronae Regni Poloniae perpetuo applicare, a clause interpreted by historians to mean anything from a personal union between Lithuania and Poland to a complete incorporation of Lithuania into Poland.
Aquel incluía a promesa de converterse ao cristianismo, a de recuperar as terras perdidas por Polonia a mans dos seus veciños, e a de terras suas Lithuaniae et Russiae Coronae Regni Poloniae perpetuo applicare, cláusula que os historiadores interpretan de varias maneiras: dende unha unión persoal entre Lituania e Polonia á incorporación completa de Lituania a Polonia.