The debt was funded by bonds, which became the base for issuance by banks of their own private currency (called National Bank Notes or "brown seal" notes -- they had a brown seal instead of the green one on notes today). The Supreme Court came close to ruling paper money unconstitutional, and this put pressure on Congress to restore the country to the gold standard. That required contracting the paper currency, and the legal way to do that was pay back the debt and retire the bonds.
This Congress did by stealing land from the Indians and selling it to settlers, generating a surplus. Also, the contracting currency attracted investment from abroad (to get around high protective tariffs one had to pay in gold), and this grew the economy, providing for additional revenue. From the late 1860s to 1890, Congress systematically paid off debt until it finally was able to reissue gold coins en masse (called the Resumption, commencing in 1880).
However, some Civil War debt persisted into the 1960s and 1970s, in the form of "red seal" notes properly called United States Notes. You can buy specimens of red-seal notes at any large coin dealer, and they're not too expensive.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.