Henry B. Walthall: Henry B. Walthall. Actor: The Birth of a Nation. Henry B. Walthall was a respected stage actor who became a favorite of pioneering film director D.W. Griffith. Born in 1878 in Alabama, Walthall was initially interested in pursuing a law career but he quit law school in 1898 to enlist in the US Army in order to fight in the Spanish-American War. Returning from the war he decided to take...