"The Conquest of the West, Volume 3. The Founding of the Trans-Allegheny Commonwealth, 1784-1790" is the work of the famous American politician and writer Theodore Roosevelt. In this book, he examines the period in the history of the United States of America when the first states were settled and established in the region beyond the Allegheny Mountains. The author describes in detail the events that took place in the period from 1784 to 1790, talks about the difficulty of colonizing new territories, relations with local Indian tribes and other important aspects of the formation of the West as an independent region. This book is not only a historical essay, but also helps the reader to better understand the complex relationship between Native American peoples and early American settlers. The detailed history of reconstruction and the formation of new communities helps to better understand the processes that formed the basis of the modern political system of the West. "The Conquest of the West, Volume 3" is a must-read for anyone interested in American history and its formation as a nation.