No main purpose was fur trading
Answer:
The wars in Iraq and Afghanistan touch the U.S. economy in a variety of ways beyond the impact of direct spending. First, Iraq has a lot of oil, and swings in the country’s production levels have an effect on global oil pricing. By some estimates, Iraq has the second-highest amount of oil in the world, behind Saudi Arabia. The Wall Street Journal reported in December 2007 that improving security conditions had allowed Iraqi oil production to return to pre-war levels. But the former Iraqi oil...
They learned that they could use the media to make their acts of terror, more public. They also learned that attacking certain things of importance, would cause more terror.