He has taught an array of courses , primarily focused on modern Europe , giving lectures especially on the history of Europe , Germany , and the Holocaust , and social science methods and approaches to historical study .
Johnson joined Central Michigan University in 1976 .
Johnson has taught an array of courses , primarily focused on modern Europe , giving lectures especially on the history of Europe , Germany , and the Holocaust , and social science methods and approaches to historical study .
Johnson joined Central Michigan University in 1976 .