Kuwait remains a key to the U.S. ability to act militarily in the northern Persian Gulf region now that all U.S. forces have left Iraq. Kuwait was pivotal to two decades of U.S. efforts to end a strategic threat posed by Iraq because of its location, its role as the object of past Iraqi aggression, and its close cooperation with the United States. Kuwait's relations with the post-Saddam government in Iraq have warmed significantly in recent years through resolution of many of the territorial, economic, and political issues from the 1990 Iraqi invasion of Kuwait. Although the threat from Iraq has abated, Kuwait is increasingly suspicious of Iranian intentions in the Gulf, aligning Kuwait with U.S. efforts to contain Iranian power in the Gulf and prevent Iran from exerting undue influence in Iraq.