Complex sentence: The fighting beriefly stopped in June but again flared when the security forces loyal to Puntland authority attacked the main base of Mr. Atom's militants in Galgala on 13th of August declared the war was over just before Christmas of 2010.
Split into simpler sentences: The fighting beriefly stopped in June but again flared when the security forces loyal to Puntland authority attacked the main base of Mr. Atom's militants in Galgala on 13th of August 2010. The finally came to end when Puntland declared the war was over just before Christmas of 2010.