Complex sentence: An American patrol fired on Filipino troops, claiming afterwards that the Filipinos had started shooting first and the whole Filipino line from Pasay to Caloocan returned fire and the first battle of the Filipino-American War ensued.
Split into simpler sentences: An American patrol fired on Filipino troops, claiming afterwards that the Filipinos had started shooting first. The whole Filipino line from Pasay to Caloocan returned fire and the first battle of the Filipino-American War ensued.