At the beginning of the twentieth century, the continent of Africa was a hotbed of international trade, colonialism, and political gamesmanship. So when World War I broke out, the European powers were forced to contend with one another not just in the bloody trenches, but in the treacherous jungle. And it was in that unforgiving land that General Paul von Lettow-Vorbeck would make history. With the now-legendary Schutztruppe (Defensive Force), von...