Kammala jumla mai zuwa: IMRO ya kasance "jihar cikin jihar" a yankin a cikin 1920s ta amfani da shi don kaddamar da hare-hare a cikin sassan Serbia da Girka na Macedonia. A wannan lokacin IMRO ya zama ƙungiyar masu tsattsauran ra'ayi na Bulgarian. Dangane da ƙididdigar IMRO a cikin shekarun 1920 a yankin Yugoslav (Vardar) Makidoniya sun yi aiki da chetas 53 (bandungiyoyi masu dauke da makamai), 36 daga cikinsu sun shiga daga Bulgaria, 12 na gida ne kuma 5 sun shiga daga Albania. A cikin yankin Girka (Aegean) Makidoniya 24 chetas da ƙungiyoyin bincike na gida 10 suna aiki. Dubban 'yan asalin Slavophone Macedonians' yan asalin Yugoslav da na Girka sun danne su saboda zargin da ake yi na hulɗa da juyin juya hali. An shirya jama'a a Pirin Macedonia a cikin masu tsaron gida na jama'a. Wannan rundunar 'yan bindiga ce kawai, wacce ta yi adawa da sojojin Girka lokacin da Janar Pangalos ya kaddamar da yakin basasa a kan Petrich District a 1925, wanda ake kira War of the Stray Dog. Kashe-kashen 'yan uwantaka da kisan kai na IMRO a kasashen waje sun tayar da wasu daga cikin sojojin Bulgaria bayan da aka yi wa'adi a watan Satumba.
Juyin mulkin 19 ga Mayu 1934 don karɓar iko da karya ikon ƙungiyar. A halin yanzu, hagu daga baya ya kafa sabuwar kungiyar bisa ka'idodin 'yancin kai da haɗin kan Macedonia da aka raba. Sabuwar kungiyar wacce take adawa da IMRO na Ivan Mihailov an kira ta IMRO (United). An kafa shi a 1925 a Vienna. Koyaya, ba shi da goyon baya na gaske kuma ya kasance mai aiki har zuwa 1936 kuma Comintern da Balkan Communist Federation sun ba shi kuɗi kuma suna da alaƙa da shi. A cikin 1934 Comintern ta amince da ƙuduri game da amincewa da al'ummar Macedonia kuma ta tabbatar da aikin Tarayyar Kwaminisanci na Balkan game da ƙirƙirar Jamhuriyar Tarayyar Balkan, gami da Makidoniya.