"The Bled agreement was an agreement signed on the 1 August 1947 by Georgi Dimitrov (Bulgarian leader) and Josip Broz Tito (Yugoslav leader), which paved the way for Bulgaria to become the seventh republic of Yugoslavia.
Provisions agreed included economic cooperation, preparation of a customs union, citizenship between the two countries and more. The Yugoslav Government also waived $25 million in war damages owed by Bulgaria.
The policies resulting from the agreement were reversed after the Tito–Stalin split in June 1948."