Complex sentence: The ridge's highest point is Punta Alta (705.5 m) known as Hill 705 ("Cota 705") during the Battle of the Ebro in the Spanish Civil War (1936-39).
Split into simpler sentences: The ridge's highest point is Punta Alta (705.5 m). This summit was known as Hill 705 ("Cota 705") during the Battle of the Ebro in the Spanish Civil War (1936-39).