He used two preexisting cultural strengths to great effect. The first was the songs the slaves sang at their midnight celebrations of voodoo. Louverture was a devout Catholic who would later outlaw voodoo—but he was also a pragmatist who used the tools at hand. So he converted this simple, memorable vocal template into an advanced communications technology. The Europeans had no means of long-distance, encrypted communication, but his army did. His soldiers would place themselves in the woods surrounding the enemy, scattered in clumps. They would begin their voodoo songs—which were
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