By the late 1940s, Harley-Davidson has become America’s leading motorcycle manufacturer. The family-owned Milwaukee brand has battled hundreds of companies since its first bike rolled out of a backyard shack in 1903. Now they’re facing the birth of the outlaw bikers, disenfranchised WWII vets who love their Harleys—and love to cause trouble. It’s an association that conservative Harley owners can’t stand.

And fierce competition is coming in from British bike makers. Triumph is churning out lightweight, sporty machines that are the polar opposite of Harley’s heavy hogs, and everyone is vying for a piece of the lucrative U.S. market. Things get so cutthroat that Harley-Davidson appeals to the government. It’s an appeal that will not have happy results for the Milwaukee contingent. And the problems are just beginning.

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