N 1890, Captain Alfred Thayer Mahan<span>, a lecturer in naval history and the president of the United States Naval War College, published The Influence of Sea Power upon History, 1660–1783, a revolutionary analysis of the </span>importance<span> of naval power as a factor in the rise of the British Empire.</span>
By taking them to the north to freedom and possibly to Canada where slavery was illegal
I don't see a map, but you would pick a place with a lot of water (or a river), plants, and farmland (or silt)
