. . "And, 50 years of independence is an occasion to commemorate the liberation of our nation from colonial rule.???Nkrumah played an instrumental role in motivating leaders such President Robert Mugabe, former Namibian president Sam Nujoma, and the late Samora Machel of Mozambique to take up arms and fight for independence while numerous other leaders of his time such as Kenneth Kaunda of Zambia and J" . .