On a few occasions, he even fought against both the Taborites and the Orebites to try to force them into reuniting.

In 1420 he participated in the siege of Vyšehrad in part and joined the Orebites.

Orebites were followers of the Hussites in Eastern Bohemia.

The ideological founder of the Orebites was a priests named Ambrož Hradecký.

During the Hussite Wars, Hynek initially fought with the eastern Bohemian Orebites; he was their captain.

The Utraquists were a moderate faction of the Hussites (in contrast to the more radical Taborites, Orebites and Orphans).

In June the Orebites, as they called themselves, conquered Hradec Králové and Ambrož was reinstated in his parish.

Žižka eventually left Tabor because that community became too radical for his beliefs and took over the leadership of the more moderate Orebites in Hradec Králové.

Similar army camps were also built, notably one on the mountain of Oreb, where another group of radical Hussites established themselves, and became known as the Orebici (Orebites).

The Taborites usually had the support of the Orebites (later called Orphans), an eastern Bohemian sect of Hussitism based in Hradec Králové.

Beginning with the most radical, the various sects that existed were the: Adamites, Taborites, Orebites, Sirotčí ("Orphans"), Utraquists and Praguers.

This force, founded in 1423 originally under the name Lesser Tábor, consisted mostly of poorer burghers and some members of lower aristocracy, who joined with commander Jan Žižka and the eastern Bohemian Hussites, the so-called Orebites (Orebité).