Brian O'Leary | Substack

Brian O'Leary

Colonel-US Marine Corps (Ret) | Penn State University | US Army War College | @Penn_State | @ArmyWarCollege | @USMC

72K+ subscribers

Danger Close with Brian O'Leary

By Brian O'Leary

A retired Marine colonel offers insights on current events, American culture, national security, foreign affairs and more.

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