The Ottoman Military Installation was a secret Central Powers military facility located in the Ottoman Empire. It is the facility where Dr. Isabel Maru was developing her new formula for Mustard Gas. It is also the facility where the German Empire stockpiled the last of their armaments near the end of the First World War.
British Intelligence learned that General Erich Ludendorff had planned a trip to the facility so Steve Trevor disguised himself as German pilot so he could infiltrate the facility. During his surveillance mission, Captain Trevor witnessed Doctor Poison’s mustard gas experiments. These experiments were so horrible that he decided to break the parameters of his mission and steal Maru’s Journal for British intelligence. During his escape, Steve Trevor managed to destroy the facility.