Bulgaria declares itself an independent kingdom.
During World War I, Bulgaria allies itself with Germany. Over 100,000 Bulgarian troops were killed, which was the most severe per capita loss if any nation during the war.
The Soviet Army invades German occupied Bulgaria near the end of World War II.
Bulgaria communist party becomes one of the Soviet Union's most loyal allies.
The end of the communist regime liberalizes price controls in the market and led to an economic crisis in the country.
Protests against the inflation in prices, rise in unemployment, and decrease in social service prompted the government to seek assistance from international financial institutions.
Bulgaria becomes a member of the European Union, which aids the country in revitalizing its economy.