Those battles were to avenge the death of this god's father, who was killed by Set.  
In some myths he is mentioned as the husband of Hathor and the son of Ra, and he was initially worshipped as a war god.  He killed many hippopotamuses and crocodiles during many battles that ended when this god won a boat race using a wooden boat compared to his adversary's stone boat.  Those battles were to avenge the death of this god's father, who was killed by Set.  For 10 points, name this Egyptian god who avenged his father Osiris and had the head and sometimes wings of a falcon.
In some myths he is mentioned as the husband of Hathor and the son of Ra, and he was initially worshipped as a war god.  
Horus