On April 6, 1917, Germany's policy of unrestricted submarine warfare finally compelled the United States to declare war on Germany. The U.S. did not, however, declare war against Bulgaria or Germany's other allies, since Bulgaria did not have submarines and did not directly threaten American interests. The Bulgarian Prime Minister, Radoslavov, summoned U.S. Consul Dominick Murphy and assured him that Bulgaria was anxious to maintain good relations with the United States. Bulgaria and the U.S. were put into the position of being members of different alliances at war with each other, while keeping diplomatic relations.