The new government's apparent communist ties concerned Western governments. As Zanzibar lay within the British sphere of influence, the British government drew up a number of intervention plans. However, the feared communist government never materialised, and because British and American citizens were successfully evacuated, these plans were not put into effect. Meanwhile, the Communist Bloc powers of East Germany and the Soviet Union, along with the anti-Soviet People's Republic of China, established friendly relations with the new government by recognising the country and sending advisors. Karume succeeded in negotiating a merger of Zanzibar with Tanganyika to form the new nation of Tanzania, an act judged by contemporary media to be an attempt to prevent communist subversion of Zanzibar. The revolution ended 200 years of Arab dominance in Zanzibar, and is commemorated on the island each year with anniversary celebrations and a public holiday.