 Complete the following phrase:  Following the 1939 German invasion of Poland, the CvetkovićMaček government declared its neutrality. After the Axis Tripartite Pact was joined by neighboring countries of Hungary, Romania on 20 and 23 November 1940 respectively, and by Bulgaria on 1 March 1941, Yugoslavia followed their example on 25 March 1941 and joined the alliance. Two days later, the 