Lazar Tešanović () was a Serbian schoolteacher and military officer. He was a reserve lieutenant of the Royal Yugoslav Army and later a Chetnik military officer during World War II.

World War II During the War, Tešanović founded the Obilić Detachment which operated between the two rivers, Vrbas and Vrbanja, and south to the mountain Vlašić.Tomasevich, Jozo (1975). War and Revolution in Yugoslavia, 1941–1945: The Chetniks. Stanford: Stanford University Press. . The detachment took a main part in the Lipovac ambush on the Partisan Company led by Mladen Stojanović, who was badly wounded in the fight.

On 23 May 1942, Tešanović entered into an agreement with the Independent State of Croatia, requesting arms and ammunition to fight against the Partisans.NAW, T-314, Roll 566, 000359-1: Prijevod sporazuma postignutog na sastanku komandanata četničkih odreda „Obilić“ i „Mrkonjić“ sa predstavnicima vlasti NDH u Banja Luci na dan 23. maja 1942. He also collaborated with the Nazi Germans.NAW, T-314, Roll 563, 001130: Poruka četničke grupe Tešanović (30. decembar 1943.).

On 8 July 1943, the Obilić Detachment became part of the Middle-Bosnian Chetniks Corps and Tešanović became commander of that corps.

See also Mile Mećava Mladen Stojanović

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