Conversation so far:
When did Dwight D. Eisenhower join World War I?
In September 1917, he was assigned to train reserve officers, first at Fort Oglethrope and then at Fort Leavenworth.
Where was Dwight D. Eisenhower stationed during World War I?
In February 1918, he was transferred to Camp Meade, Maryland, where he was assigned command of the 301st Heavy Tank Battalion.

Question: What rank was he when at Camp Meade?
Self-contained rewrite: What rank was Dwight D. Eisenhower when at Camp Meade?