History of Kazakhstan
A week after the election, Nazarbayev became the president of an independent state when the leaders of Russia, Ukraine and Belarus signed documents dissolving the Soviet Union. He quickly convened a meeting of the leaders of the five Central Asian states (Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, and Uzbekistan), raising the possibility of a Turkic confederation of former republics as a counterweight to the Slavic states of Russia, Ukraine, and Belarus in whatever federation might succeed the Soviet Union. This move persuaded the three Slavic presidents to include Kazakhstan among the signatories of a recast document of dissolution. Kazakhstan's capital lent its name to the Alma-Ata Protocol, the declaration of principles of the Commonwealth of Independent States. On 16 December 1991, five days before the declaration, Kazakhstan became the last of the republics to proclaim its independence.
Czechoslovak–Hungarian population exchange
"We have decided now that our liberated State shall be a national state, rid of all hostile elements, living in brotherly harmony with the family of Slav States and in friendship with all peace-loving nations of the world. (§ 9) [...] The Czechoslovak Republic is a unitary State of two Slav nations possessing equal rights, the Czechs and the Slovaks." (Article II/1 )"