As early as 1960, many African nationalists began to challenge Rhodesia's minority rule policies. In 1964, tensions boiled over and the Rhodesian Bush War began. On one side, the minority rule government, led by Ian Smith, hoped to keep the whites in power. On the other side, the ZANU-PF, led by Robert Mugabe, fought for majority rule. After about 15 years of fighting, the Lancaster House Agreement was signed which allowed majority rule. This led to Zimbabwe's independence.