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.
What was Thabo Mbeki's mission in Lusaka?
The aim of the RC at this time was to bridge an ever-widening gap between the ANC in exile and the people back home.
What did Thabo Mbeki do while in Lusaka?
Thabo Mbeki moved over to work in the ANC's propaganda section. But he continued to attend RC meetings.
What was a career highlight while Thabo Mbeki was in Lusaka?
Four months after his arrival in Lusaka, Thabo Mbeki travelled to Beichlingen to deliver a speech on behalf of the ANC's Executive Committee at the YSS summer school.
Was the outcome good of Thabo Mbeki's speech on behalf of the ANC's Executive Committee at the YSS summer school good?
This was a turning point in Thabo Mbeki's life as it was the first time he spoke on behalf of the ANC as opposed to the ANC Youth League.

Question: When did he arrive in Botswana?
Self-contained rewrite: When did Thabo Mbeki arrive in Botswana?