A large area in the southwest of Russia became absorbed by Lithuania and Poland after the destruction of Kievan power by the Tartars. This southwestern part of Russia was commonly known as Little Russia or Rus which in Latin became Ruthenia; this is the territory that is present day Ukraine. In 1386, the kingdoms of Poland and Lithuania were united under a single ruler. The monarch of the united realm was Roman Catholic, and a substantial minority of the population were Russian and Orthodox. These Orthodox were in a difficult situation because the Patriarch of Constantinople, to whose [[jurisdiction]] they belonged, could exercise no control in Poland, as the former Byzantine capital had fallen to the Muslim Turks. The bishops were appointed not by the Church but by the Roman Catholic king of Poland.

The authorities in Poland always tried to make the Orthodox submit to the pope to reunify Christianity. With the arrival of the Jesuits in 1564, pressure on the Orthodox increased. Secret negotiations with The state of the Ruthenian Church was poor; clergy were uneducated and the Orthodox bishops, were without the nominees of Roman Catholic monarchs, funds they needed to properly run the Church. Many priests were used to "unite" them with Rome ordained without the faithful’s knowledgebasic training and new rites were developing that were neither Latin nor Greek in their character. But instead it led Constantinople was now under Muslim rule and Moscow had recently been elevated to a council being summoned at Brest-Litovsk Patriarchate. The Ruthenian bishops were stuck between a population converting to proclaim Roman Catholicism on the West and a rising Muscovite force in the union with Rome publiclyEast.

At this synod six out of eight Orthodox bishops — including the Metropolitan of KievKyiv, Michael Ragoza — supported the union, but the remaining two three bishops, together with a large number of the delegates from the [[monastery|monasteries]] extreme west of Ukraine and Eastern Poland (Lviv', Lutsk, and from Przemyśl) would not join the [[parish]] [[clergy]]union until later (1700, 1702, desired to remain members of the Orthodox Church. The two sides concluded by excommunicating and anathematizing one another1693 respectively).  The government recognized only the decisions Cossack forces of Ukraine felt the Roman party at Union was a bretrayal to the Council of Brest, so, from their point of view, Polish rulers and united with the Orthodox Church in Russian Empire to fight against Poland had now ceased to exist. Against the wishes of both the monks and all who supported the congregationsEmpire, monasteries and churches were forcibly seized and given to including the UniatesGreek-Catholics. This attempt In 1620 Patrarch Theophanes II of Jerusalem arrived in Kyiv and ordained an Orthodox hierarchy for the unity of Christendom backfired, Ruthenian Church and the Union thus there emerged a situation of Brest has further embittered relations between Orthodoxy both Orthodox and Rome from 1596 until Eastern Catholic bishops coexisting in the present day. The main sore point is that, same territory in Ukraine from the Orthodox this point of view, the Jesuits began their quest for union through deceit and then resorted to violenceonwards.