Polish War on Succession (1400) (Premysloides Dynasty)

Background
Polish War on Succession, or also "Anarchy", was tragic and destructive era of about 30 years after defeat of Polish forces in Invasion of Baltic and capturing King Casimir the Great by Imperial Army. During next 30 years, 7 different noble families tried to conquer and keep Polish Throne.

Except short and unsuccessfull attempt to enthronment Louise the Piast, Hungarian magnate and great-grandson of Henry V of Silesian Piasts, Roman Empire was for most time inactive and ignored Polish internal civil war, especially because borderland provinces of Poland flourished in time of lawless and tax-less era and so enriched imperial border provinces.

In 1371, after failed attempt, remnants of royal branch of Piast house elected Henry III of Brzeg as new King of Poland. Immediately, Polish Szlachta declined accept new king, as they wanted to form constitutional aristocratic republic with rule of estates and Sejm.

Polish Szlachta met in Poznań and declared their Sejm and while they were unite in their hostile stances toward Roman Empire and Regent Council, they were divided in decision of their own leadership. 500 szlachta delegates discussed and elected new "President of Sejm", de facto ruler of Poland, Albert Wettin. He got 59 votes against 55, 49, 47, 42, 40 and 40 votes of Gryfici, Olshanski, Schachkowski, Kurnatowski, Ossowski and Jadwinski representative. 51 votes were against all and 117 invalid or abstain.

This chaotical results were misused by Regent Council who declared unity under Henry III, King of Poland and High Duke of Kraków, while republican Szlachta was quarreling among themselfs.

House of Kassirski ignored both, Regents and Szlachta, and contacted Roman Empire with proposal of their own enthronment. Emperor Arcadius II declined this, as he was interested in Persian, Russian and Caucasian Campaign and was unable to focus on Poland (especially after death of Louise the Piast), but Imperial Intelligence keep contacts with Kassirski and slowly, but steady rearmed and trained their own militia and cavalry in Voivodina.

President Albert Wettin used his connections with his German relatives and was able to gather 10,000 troops and cavalry, which marched on Kraków, where were Royal Court and coronated Henry III.