The two most important events in creating ISIS were the US-led invasion of Iraq in 2003 and the outbreak of the Syrian civil war in 2011.
Lucrative trading between the two such as cotton and other goods which then also used alcohol in negotiations which at the time was a powerful tool to negotiate.
Some problems faced were fighting against communism and keeping their democratic governments
they were also in huge amounts of debt
One supreme court case in the twentieth century that affected civil rights