Conversation so far:
When did Prabhupada religious journey start?
In 1922, when Prabhupada first met his spiritual master, Bhaktisiddhanta Sarasvati Thakura. In 1933 he became a formally initiated disciple of Bhaktisiddhānta.
What happened to Prabhupada along the journey?
Prabhupada was requested to spread the message of Chaitanya Mahaprabhu in the English language.
What was the next step for Prabhupada after that?
In 1950, Prabhupada lived at the medieval Radha-Damodar mandir in the holy town of Vrindavan, where he began his commentary and translation work of the Sanskrit work Bhagavata Purana.

Question: What did that lead to?
Self-contained rewrite: What did Prabhupada's commentary and translation work lead to?