[2] In 2010, Persibo played in the Indonesia Super League (the top tier of Indonesian football) after winning Divisi Utama the previous season.

[4] The club was established on 12 March 1949, on the initiative of Raden Tumenggung Sukardi who served as Regent of Bojonegoro at that time.

At the same time, the national football public was shocked and began to reckon with them, in doing so dubbed the team as The Giant Killer.

On top of that, the club were in the middle of a severe financial crisis which ultimately led to their eventual demise and relegation to the lowest tier of Indonesian football at the time, Liga Nusantara.

For several years after relegation to Liga Nusantara (which would later rebranded as Liga 3), the club was simply inactive due to several things, partly for financial reason and being banned by PSSI for breaking away from the official competition during the 2011 schism in the federation (commonly referred to as Dualisme, Dualism).

Interestingly however, Boromania have a very good relationship with the two largest groups of supporters in East Java who shared a long history of hostility towards one another, namely Bonek of Persebaya Surabaya and Aremania of Arema FC.