 Complete the following phrase:  Relations between the PRC and India deteriorated during the rest of the 1960s and the early 1970s while the ChinaPakistan relations improved and Sino-Soviet relations worsened. The PRC backed Pakistan in its 1965 war with India, and issued ultimatums threatening military action at its own border. The threats only served to damage Pakistans relations with the western powers. In late 1967, there were two more conflicts between Indian and Chinese forces at their contested border, in Sikkim, known as the 