Complex sentence: It is based on the true events of World War II. A strategic plan for a combined Axis powers attack in 1943 against the Yugoslav Partisans, known as Fourth enemy offensive which occurred on the Neretva in Bosnia and Herzegovina.
Split into simpler sentences: It is based on the true events of World War II. The Battle of Neretva was due to a strategic plan for a combined Axis powers attack in 1943 against the Yugoslav Partisans. The plan was also known as the Fourth enemy offensive and occurred on the Neretva in Bosnia and Herzegovina.