Complex sentence: "Bloody incidents" in 1966-67 flared up as Chinese and Soviet forces clashed along the border as the Soviets trained anti-Chinese guerillas and urged Uyghurs to revolt against China, hailing their "national liberation struggle".
Split into simpler sentences: Bloody incidents in 1966-67 occurred as Chinese and Soviet forces clashed along the border. The Soviets trained anti-Chinese guerillas and urged the Uyghurs to revolt, praising their "national liberation struggle".