Both parties vied for domination but in 1964 both were banned and the leaders were all arrested. Both parties chose to leave the country and reorganise and form armies from outside Rhodesian borders, although they chose different countries to make their base. ZAPU based itself in the West and Zambia where it organised ZIPRA (the Zimbabwe People's Revolutionary Army.) They allied with the Soviet Union and organised a vanguard of highly trained soldiers. ZANU, however, moved into Tanzania and then to Mozambique and set up ZANLA (Zimbabwe African National Liberation Army) which concentrated more on mobilising the masses in the countryside in a method pioneered by the Chinese.