Based on the context and the answer, generate a question. 

Context: Bumblebee served under him . Bulkhead was in charge of all of Cybertron 's space bridges . And Ratchet was retired on some quiet planet with a pink and white femme that he 'd known from before . They were all gone .

Answer:

They all worked together on a team .



What may have been true of them in the past ?