"Hungary (20 November 1940), Romania (23 November 1940), Bulgaria (1 March 1941) and Yugoslavia (25 March 1941), as well as by the German client state of Slovakia (24 November 1940). Yugoslavia's adherence provoked a coup d'état in Belgrade, and Italy and Germany responded by invading Yugoslavia"
Note that some countries first signed and only then the Nazi regimes came to power in them. Hard time in Europe then.
http://en.wikipedia.org/wiki/Munich_Agreement
"The agreement was signed by Germany, France, the United Kingdom, and Italy."
and:
http://en.wikipedia.org/wiki/Tripartite_Pact
Initially: "Germany, Italy and Japan"
then:
"Hungary (20 November 1940), Romania (23 November 1940), Bulgaria (1 March 1941) and Yugoslavia (25 March 1941), as well as by the German client state of Slovakia (24 November 1940). Yugoslavia's adherence provoked a coup d'état in Belgrade, and Italy and Germany responded by invading Yugoslavia"
Note that some countries first signed and only then the Nazi regimes came to power in them. Hard time in Europe then.