Complex sentence: As WW2 broke out, not long after guerilla organization sprouted in all nooks of the country that the emergency municipality of Calatrava was created on June 4,1943 together with Alcantara and Libertad as sponsored by the guerilla movement regime under the Revolutionary Republic of the Philippines.
Split into simpler sentences: As WW2 broke out, not long after guerilla organization sprouted in all nooks of the country. Thus the emergency municipality of Calatrava was created on June 4,1943, together with Alcantara and Libertad sponsored by the guerilla movement regime under the Revolutionary Republic of the Philippines.