Conversation so far:
How did Erich Honecker get back into politics?
Following World War II, Erich Honecker was freed by the Soviet army and relaunched his political activities.
What did Walter Ulbricht have to do with Erich Honecker's return to politics?
In May 1945 Erich Honecker was picked up by chance in Berlin by Hans Mahle and taken to the Ulbricht Group.
Did Erich Honecker's return to politics go smoothly?
Erich Honecker’s role in the group was undecided, as he had yet to face a party process. This ended in a reprimand due to his undisciplined conduct in fleeing prison.
Did Erich Honecker remain in office?

Question: What did he study?
Self-contained rewrite: What did Erich Honecker study?