 On June 26–28, 1991, an International Conference "Molotov–Ribbentrop Pact and its consequences for Bessarabia" took place in Chișinău, gathering historians such as Nicholas Dima, Kurt Treptow, Dennis Diletant, Michael Mikelson, Stephen Bowers, Lowry Wymann, Michael Bruchis, in addition to Moldovan, Soviet and Romanian historians.An informal "Declaration of Chișinău" was adopted, according to which the Pact and its Secret Protocol "constituted the appogeum of collaboration between the Soviet Union and Nazi Germany, and following these agreements, Bessarabia and northern Bukovina were occupied by the Soviet Army on June 28, 1940 as a result of ulitmative notes addressed to the Romanian government".These acts were given the characteristic of a "pregnant manifestation of imperialist policy of annexion and dictat, a shameless aggression against the sovereignty (...) of neighboring states, members of the League of Nations.