Complex sentence: He also strengthened military ties with neighboring China, while deteriorating relations with Soviet Union and India which saw the five-week war in 1965, ending in a United Nations-mandated ceasefire.
Split into simpler sentences: He also strengthened military ties with neighboring China, while relations deteriorated with the Soviet Union and India. There was the five-week war in 1965 with India, ending in a United Nations-mandated ceasefire.