How many movies have H.E. Aitken and Raoul Walsh collaborated on?

They have worked on 2 movies together! Their first movie together was The Life of General Villa (1914) while their highest rated movie together was The Birth of a Nation (1915). They have not worked together since The Birth of a Nation (1915).

Crew
Executive Producer
Crew
Editor
Role
John Wilkes Booth
Crew
Assistant Director
Crew
Producer
Crew
Director
Crew
Writer
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Director of Photography
Role
Villa as a young man