July 4 South–North Joint Statement
For the first time since division, the two Koreas agreed on three principles of unification — independence, peace and national unity — announced simultaneously in Seoul and Pyongyang.

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As the Cold War eased with the US–China rapprochement, North–South Red Cross talks began in 1971. After secret contacts, a joint statement was issued simultaneously in Seoul and Pyongyang on 4 July 1972.
It set three principles: unification independently of outside powers, by peaceful means, and through great national unity transcending differences of ideology and system; and it created a South–North Coordinating Committee. Both sides, however, used it to strengthen their own dictatorships — the Yushin constitution in the South and the Socialist Constitution in the North.