How did the US get into debt and to whom did it owe money?

The U.S. accumulated debt primarily through government borrowing to finance wars, economic downturns, and various federal programs. Major contributors to the national debt include World War I and II, the Great Depression, and more recently, the 2008 financial crisis and COVID-19 relief efforts. The U.S. owes money to various entities, including domestic and foreign investors, financial institutions, and foreign governments, with significant portions held by countries like China and Japan. Additionally, much of the debt is held in the form of Treasury securities, which are sold to raise funds.