Little Country, Big Country (countries)

When I first looked at the two maps, I tried looking really hard for a reason why there would be any conflict. Then I realized, a noticeable portion of the major oil-producing is produced in Kuwait. To the north east of Kuwait is the large country of Iran, to the south of Kuwait is the equally larger country of Saudi Arabia, and to the north west of Kuwait is the somewhat large Iraq. Being such a small country that produces a major amount of the oil that lies between three behemoths can start human conflicts like a forest fire. I don't have any other choice but to think that the miniature country of Kuwait has some thing that Iraq, Iran, and Saudi Arabi either don't have, need, or want (or an existing alliance). Other than those reasons, I don't see why one or all three of the countries can't just invade Kuwait, using their over-powering armies, and recieve the profit that Kuwait is gaining from their oil producion.