Conversation so far:
Did Bert Bell teach at Penn?
Bell entered Penn in the fall of 1914.
What did he coach or teach?
as an English major and joined Phi Kappa Sigma.
How long did he teach?
CANNOTANSWER.
Did he have any scandals while teaching?
his aversion to attending classes forced him to withdraw from Penn without a degree in early 1920.
What did he to after teaching?
for bravery from General John J.
Pershing, and Bell was promoted to first sergeant.
How long was he enlisted?
in March 1919.

Question: What branch?
Self-contained rewrite: What branch of the army was Bert Bell enlisted in?