All Serb Orthodox clergy who objected to the union were arrested and sentenced to life in prison in Malta, where they died.

[9] Orthodox Christians which settled Military Frontier from area of the Ottoman Empire were most often called Vlachs, while most documents state that the Vlachs coming "from Bosnia" or "from Turkey" ie from the Bosnian pashaluk, also they were of different ethnic origin and from 1611 under the Greek Catholic bishops of Marča.

[12] Some scholars promoted the view that Marča, as a diocese of the Serbian Patriarchate of Peć, was established in the late 16th century (1578 or 1597).

[13] This theory was used as evidence[clarification needed] of the long-time presence of the Serb population on the northern bank of river Sava.

[16] Being under strong pressure from Croatian clergy and state officials to recognize the jurisdiction of the Pope, and to convert the population of his bishopric to Eastern Catholicism, Simeon Vratanja visited Pope Paul V in 1611 and recognized his jurisdiction and maybe the Union of Florence as well.

[17] The strongest influence to his decision had Martin Dobrović, who convinced Simeon to recognize papal jurisdiction and to accept the Eastern Catholicism.

[2] Simeon continued to use Slavic language, Julian calendar and maintained connection with Serbian Patriarchate of Peć.

[23] In 1642 Benedikt Vinković wrote a letter to emperor Ferdinand III to write a report about "Vlachs" (Orthodox Serbs).