Period of strained relations between the two
major communist powers, China and the USSR
during the early 1960s, thus dividing the
communist world. The tension was based partly
on differences in ideology but also involved
rivalry for leadership and old territorial
border claims. The Chinese Communists also
criticized the USSR for supplying aircraft to
India and for withdrawing technical and
military aid to China in 1960. The USSR
supported India in its border warfare with
China between 1961 and 1962.