Complex sentence: Since its founding the UNU has established itself as an organiser of regular politically resonant campaigns including marches in honor of Ukrainian Insurgent Army in Kiev, Kharkov and Poltava, marches against Illegal Immigration in Kharkov and other.
Split into simpler sentences: Since its founding the UNU has established itself as an organiser of regular politically resonant campaigns. Including marches in honor of Ukrainian Insurgent Army in Kiev, Kharkov and Poltava, marches Against Illegal Immigration in Kharkov and other.