What is the overall trend in oil prices over time?

Why did un coalition troops battle iraqi forces in 1991? iraq had invaded saudi arabia, along with its other border nations.iraq had invaded kuwait, which was a major source of the world's oil.the united nations wanted to remove saddam hussein from power.the united nations wanted to prevent the trade of illegal drugs.

2/7 + 4/7 equal to 6/7? plz hurry!

Which country aligned with the us after ww2