Complex sentence: The group was reduced to 12 men, and retreated to the house of Damián Torres-which was promptly strafed by 50-caliber machine gun fire, from four American P-47 Thunderbolt planes.
Split into simpler sentences: The group was reduced to 12 men, and retreated to the house of Damián Torres. Torres' residence was attacked by 50 caliber machine gun fire from four American P-47 Thunderbolt planes.