Conversation so far:
When did Thabo Mbeki arrive in Lusaka?
Together with Oliver Tambo, Thabo Mbeki left London for Lusaka in April 1971
Why did Thabo Mbeki go to Lusaka?
Thabo Mbeki went to Lusaka to take up the position of assistant secretary of the ANC's Revolutionary Council
Did Thabo Mbeki enjoy his time in Lusaka?
This was the first time in nine years that Thabo Mbeki was setting foot on African soil.

Question: What was his mission in Lusaka?
Self-contained rewrite: What was Thabo Mbeki's mission in Lusaka?