Nixon's visit to China (1972)
President Richard Nixon flew to Beijing and met Mao Zedong, ending two decades of frozen relations. The trip exploited the Sino-Soviet split, which had broken into border clashes in 1969. Henry Kissinger had laid the groundwork in secret talks the previous year.
The Shanghai Communique reopened US-China relations and gave Washington new leverage in arms talks with Moscow.
The triangle frame Nixon set, playing one rival against another, became standard great-power strategy for the next fifty years.
Nixon's move worked because he had the wedge in the third corner. This week Xi sits in that corner, hosting Washington and Moscow in turn.
