'Mostarska Operacija' was a Yugoslav operation by the forces of Marshal Josip Broz Tito to take and hold Mostar, which shielded the left flank of the Axis forces of Generaloberst Alexander Löhr’s Heeresgruppe 'E' pulling back to the north from Serbia and Montenegro through Sarajevo and along the Bosna river to Slavonski Brod (6/15 February 1945).

The Axis order of battle, under the overall command of the headquarters of Generalleutnant Georg Reinicke’s 369^th Division (kroatische), included the 369^th Grenadierregiment and 370^th Grenadierregiment, 369^th Artillerieregiment and 369^th Aufklärungsabteilung of the 369^th Division, the 359^th Regiment of Generalleutnant Eugen Bleyer’s 181^st Division, the 649^th Artillerieregiment, one anti-tank battalion, one engineer battalion, one signals battalion, two fortress battalions, other independent units and the 48^th Mobile Detachment, Pukovnik Bozidar Zorn’s Croat 2^nd Mountain Brigade and the 9^th Ustase Brigade of Zornss 9^th Mountain Division, Croat militia units, the Italian 49a CCNN Legione 'San Marco', the Gruppo artiglieria 'Lince' and, in the area of Zijemnje and Ćesim, the surviving 500 or so men of the Četnik Nevesinje Corps' 'Mostar', 'Nevesinje' and 'Konjic' Brigades.

Against this force was arrayed General-major Petar Drapsin’s Yugoslav VIII 'Dalmatia' Corps comprising Potpukovnik Ljubo Truta’s Yugoslav 9^th Division, Major Bruno Vuletić's 2^nd 'Dalmatia' Proletarian Brigade, Major Josip Babin’s 3^rd 'Dalmatia' Brigade, Major Ivan Gaće’s 4^th 'Dalmatia' Brigade and Major Mate Mestrović's 13^th 'Dalmatia' Brigade), Potpukovnik Stanko Parmač's 19^th Division (Major Rade-Radica Repac’s 6^th 'Dalmatia' Brigade and Major Repac Ilija’s 14^th 'Dalmatia' Brigade), Pukovnik Bozo Bozović's Yugoslav 26^th 'Dalmatia' Division (Major Vaso Đapić's 1^st 'Dalmatia' Proletarian Brigade, Major Ivan Guvo’s 11^th 'Dalmatia' Brigade, Major Josip-Bepo Marinković's 12^th 'Dalmatia' Brigade and Major Bogdan Viskić's 3^rd Overseas Brigade), General-major Vlado Segrt’s 29^th 'Herzegovina' Division from the Yugoslav II Corps (Major Radomir Mirković's 10^th 'Herzegovina' Brigade, Major Slavp Skender’s 11^th 'Herzegovina' Brigade, Major Ljubo Mijanović's 12^th 'Herzegovina' Brigade, Major Milorad Kujačić's 13^th 'Herzegovina' Brigade and Kapetan Radovan Sakotić's 14^th 'Herzegovina' Brigade), the six battalions of Major Franc Misjak’s Heavy Motorised Artillery Brigade of the VIII Corps, Potpukovnik Perisa Grujić's 1^st Tank Brigade, Major Jovan Andrić's 3^rd Brigade of the 'Bosnia-Herzegovina' Division, the 1^st and 2^nd Fighter Squadrons, and General-major Josip Černi’s transport force of the Yugoslav navy.

Most of central Herzegovina was part of the Hum district in the puppet state Croatia, and Mostar was also the main airfield of the Croat air force. The Yugoslav forces took Siroki Brijeg on 6 February and Mostar, without meeting resistance, on 14 February. On entering the city, the Yugoslavs seized seven Franciscans, including Leo Petrović, head of the Franciscan province, from the church of St Peter and Paul, and executed them before dumping their bodies in the Neretva river.

The operation thus proceeded basically according to plan, and its successful outcome was reflected in the casualty figures of 514 men killed, 336 men missing and 1,544 men wounded among the Yugoslav forces, and 5,558 men killed, an unknown number wounded and 1,314 taken prisoner among the Axis forces, which also lost large amounts of matériel destroyed or captured.