Complex sentence: In 1968, a new Communist Party of the Philippines was formed by Amado Guerrero (alias of Jose Maria Sison), along with its military arm, the New People's Army, headed by Commander Dante (alias of Bernabe Buscayno).
Split into simpler sentences: In 1968, a new Communist Party of the Philippines was formed by Amado Guerrero (alias of Jose Maria Sison). Its military arm, the New People's Army, was formed the next year and was headed by Commander Dante (alias of Bernabe Buscayno).