When the Louisiana Territory was added to the United States in 1803, it about doubled the size of the young nation. It took years to clarify its boundaries and explore every square mile. How this momentous purchase came to be and its implications on the future of the United States are explained in detail in this book. Simple maps and clear language help struggling readers and those in need of review to understand the many changes in the United States' land that started with this purchase in 1803.<\\P>