In the turbulent years before World War II, U.S. strategic planners struggled with the question of Canadian security. Franklin Roosevelt took a unique interest in America's northern neighbor and persistently encouraged Canada to do more to ensure its own defense especially through alliance with the U.S. This aspect of foreign policy resulted in a delicate balancing act between U.S. officials who sought to downplay the strategic importance of Canada and Canadian leaders who saw American overtures as a threat to Canadian sovereignty.

The first chapter discusses Roosevelt's early efforts...