"joined" . . "Empire of Japan" . . "treaties" . . . "Axis partner" . . "formally joined" . "Tripartite Treaty" . . . . . "alliance partner" . . . "1940" . . "allied to" . . . . "alliance with Germany" . . . . . "Tripartite Agreement" . . . . . . . . . "Bulgaria's adhesion" . "strong move to the political right" . . "Axis Tripartite Commission" . "Tripartite Alliance" . . . . . . "\\\"No separate peace\\\" agreement" . . "Germano\u2013Nipponese alliance" . . . . "Axis" . . "Tripartite Pact" . . . . . "alliance with Germany and Italy" . . . . "Tripartite Pact" . . "allies" . . . . . . . . . . . . "Axis Pact" . "alliance" . .