Operation Otto

Operation Otto was an Axis powers anti-partisan operation in Independent State of Croatia (present day Bosnia and Herzegovina) in 1943. The objective was to destroy the Partisans operating out of the Grmeč mountain in the Una-Sana bend area of west Bosnia.

The Partisan force successfully managed to get through the enemy lines and passed out of the encirclement. There was little if any contact between the opposing sides and no losses were reported.