Answer:
it stood between the Union Army and two of its most prized targets: the Gulf of Mexico to the west and Charleston to the East. It was also a symbol of Confederate pride and strength, and its fall made even the most loyal Southerners doubt that they could win the war
The correct answer is Malaria
Malaria was a huge problem since it couldn't be treated and people mostly died from it. It prevented numerous explorers from venturing into places like Africa where Malaria was running rampant due to the huge amount of mosquitoes. When it was discovered, it enabled numerous people to live at ease because they could not live with the disease or prevent getting it.
The post war economic boom was due primarily to foreign debt. The United States made substantial loans to European countries during World War I. Although the Europeans had very little money to repay the debts, American bankers restructured the loans to facilitate repayment. Although a brief recession occured in the early part of the decade, the Roaring Twenties saw the expansion of the stock market and considerable profit for investors.
