I've been wondering this for ages. Why, when there is a war now, doesn't the conquered nation become part of the winner's nation? Some people think Iraq might if we attack and win. A quote:
"Going to war with Iraq would mean shouldering all the responsibilities of an occupying power the moment victory was achieved. These would include running the economy, keeping domestic peace, and protecting Iraq's borders—and doing it all for years, or perhaps decades. Are we ready for this long-term relationship?"