This country’s communist party was castigated by the Comintern for failing to prevent a former economics professor from taking power in the June 9 coup d’etat. Communists in this country launched the September Uprising under the leadership of operatives who were later tried in the Leipzig trial. In (15[1])1925, the League of Nations stopped a war between this country and its southern neighbor after a sentry from this country shot a soldier (15[3])chasing his dog (15[1])across the (15[1])border. (15[2])This country was the (-5[1])headquarters for the IMRO, which (15[1])assassinated its prime minister (-5[1])Aleksandar (15[1]-5[1])(*) Stamboliyski (10[1])in 1923. (-5[1])The (-5[1])Treaty of Neuilly-sur-Seine forced this country to cede territories including Dobruja. (-5[2])This country’s defeat in World War I led to the abdication of its tsar Ferdinand (10[2])I. (10[1]-5[1])For 10 points, (10[1])name this (10[1])Balkan country, which, along with Germany, Austria-Hungary, and the Ottoman Empire, made up the Central Powers. (10[1])■END■ (10[3]0[4])