In 1923 and 1924 during the apogee of interwar military activity according to IMRO statistics in the region of Yugoslav (Vardar) Macedonia operated 53 "chetas" (armed bands), 36 of which penetrated from Bulgaria, 12 were local and 5 entered from Albania. The aggregate membership of the bands was 3245 "komitas" (guerilla rebels) led by 79 "voivodas" (commanders), 54 subcommanders, 41 secretaries and 193 couriers. 119 fights and 73 terroristic acts were documented. Serbian casualties were 304 army and gendarmery officers, soldiers and paramilitary fighters, more than 1300 were wounded. IMRO lost 68 "voivodas" and "komitas", hundreds were wounded. In the region of Greek (Aegean) Macedonia 24 chetas and 10 local reconnaissance detachments were active. The aggregate membership of the bands was 380 "komitas" led by 18 "voivodas", 22 subcommanders, 11 secretaries and 25 couriers. 42 battles and 27 terrorist acts were performed. Greek casualties were 83 army officers, soldiers and paramilitary fighters, over 230 were wounded. IMRO lost 22 "voivodas" and "komitas", 48 were wounded. Thousands of locals were repressed by the Yugoslav and Greek authorities on suspicions of contacts with the revolutionary movement. The population in Pirin Macedonia was organized in a mass people's home guard. This militia was the only force, which resisted the Greek army when the Greek dictator, General Pangalos launched a military campaign against Petrich District in 1925. In 1934 the Bulgarian army confiscated 10,938 rifles, 637 pistols, 47 machine-guns, 7 mortars and 701,388 cartridges only in the Petrich and Kyustendil Districts. At the same time, a youth's extension of IMRO, the Macedonian Youth Secret Revolutionary Organization was created. The statute of MYSRO was approved personally from IMRO's leader Todor Alexandrov. The aim of MYSRO was in concordance with the statute of IMRO – unification of all of Macedonia in an authonomous unit, within a future Balkan Federative Republic.