1707: Hetman Ivan Mazepa of Ukraine and Charles XII of Sweden start secret talks on joint action against Peter I of Russia.
1768: The Ukrainian Cossack and peasant rebellion against Poland, known as Koliyivshchyna, begins in Right-Bank Ukraine, to be ruthlessly suppressed with the Russian empire’s aid, leaving behind numerous victims among the civilian populace.
1771: A ukase allows thousands of Ukrainian Cossacks to settle in the vicinity of Azov.
1919: The Ukrainian Galician Army launches the Chortkiv offensive in the of the 1918-19 Ukrainian-Polish War.
1990: The first assembly of the Ukrainian Autocephalous Orthodox Church begins in Kyiv.
(Source: Welcome to Poltava) Metropolitan Mstyslav who was elected in absentia as the first Patriarch of Kyiv and all Ukraine of the UAOC on June 6, 1990. The enthronement took place on November 6, 1990 in St. Sophia Cathedral in Kyiv. During the Ukrainian Orthodox Council 1992 Ukrainian Orthodox Church and the Ukrainian Autocephalous Orthodox Church were merged into a single Ukrainian Orthodox Church – Kyiv Patriarchate while recognizing him as the Primate.
Patriarch Mstyslav died in Grimsby, Canada on June 11, 1993 and buried at the cemetery in South Bound Brook, USA.
2000: US President Bill Clinton lands at Boryspil Airport on his second visit to Ukraine (after the first one in May 1995).