The event which started the Gulf War in 1991 was a) the invasion of Kuwait by Iraq. There were the largest amount of coalition forces during this war since World War II, with most of them being from the United States, the United Kingdom, Saudi Arabia and Egypt fighting for Iraq to immediately stop it's invasion and annexation of Kuwait.
The reasons are that Rehoboam attempted to continue his father, Solomon's unwise policy of swinging taxes and then arrogantly increased them when the Israelites complained. In a very short time, the Israelites rebelled and split from Israel, forming their own kingdom called Israel.
Many immigrants from Europe began working in factories and producing goods used by people in the North. Many factories began producing textiles (cloth) with the cotton grown in the South. The economy of the South was based on agriculture.
Due process is the legal concept that all citizens will be treated equally in terms of the law. This can be seen in the US Constitution with the 5th and 14th amendments. Here is an example: If a person is arrested for committing a crime, they must have their rights read to them. Once this person is arrested and read their rights, they are entitled to a trail with a jury of their peers present. The aforementioned rights are ones that ALL citizens are entitled to, no matter who you are.