The Natural Source of Nitrogen Rich Fertilizer

The Guano Islands Act is the first overseas expansion of American empire, which to this point had been limited to westward expansion across North America. A single Peruvian island was worth more than the Gadsen purchase, Cuba, and the entire Caribbean combined. The US has dropped its claims to most of those islands, leaving them once more the sole possession of the cormorants, boobies, and their offspring. Who knows, perhaps in a few hundred years, the islands will become mountains once again.