Cadet formation on lower campus with Education Hall and old Gym in distance.

OAC cadet band in front of Education Hall (old Science Hall) led by Captain Harry Beard. Taken by Ball Studio, Corvallis, 1915. Detail of entrance to Education Hall, circa 1915.

Two Army officers walking with Education Hall in background. Uniform styles show the use of the dress blue tunic with covered buttons and high collars on one officer. Rank insignia on shoulder boards. Dating of...

Cadet officer walking with Army non-commissioned officer assigned to OAC on pathway near Education Hall (then Science Building). Dating of circa 1915 is based on early style brim on service caps and canvas...

OAC cadet corps in formation, probably on "Inspection Day", early 1920s. Entire cadet regiment moving onto the lower campus parade field. Education Building (Science Hall) is on left.

Inspection of cadet troops on lower campus with Education building in background. Cadets are wearing pre-WWI brimmed caps and canvas leggings. Rifles being inspected in back row have fixed bayonets. Notation in...

OAC cadets drilling on lower campus field. Benton Hall, water tank, and smokestack of power plant (now Owens hall) in the background. Good detail of Education Hall to the left of photo. Men are drilling with...

Small group of spectators watching movement of cadet company on parade field, lower campus across from Education Building.

Small group of spectators watching movement of cadet company on parade field, lower campus across from Education Building.

US Army officers assigned to OAC ROTC Program meeting with an unidentified man in suit. He is possibly a Military Department representative here to review cadet regiment.