US Debt

https://www.quora.com/What-would-happen-if-the-U-S-actually-paid-off-the-national-debt-Where-would-the-banks-big-financial-institutions-and-government-foreign-and-domestic-put-their-cash
https://www.thebalance.com/national-debt-by-year-compared-to-gdp-and-major-events-3306287
https://washingtonsblog.com/2015/02/america-war-93-time-222-239-years-since-1776.html
https://en.wikipedia.org/wiki/History_of_the_United_States_public_debt
https://www.thebalance.com/what-is-hyperinflation-definition-causes-and-examples-3306097
https://www.dailysabah.com/economy/2015/06/28/83-countries-went-bankrupt-in-200-years
https://www.investopedia.com/articles/investing/072115/how-military-spending-affects-economy.asp
https://www.insidermonkey.com/blog/10-biggest-industries-in-america-368585/7/