No U.S. troops in Iraq have been killed as a result of those attacks, but one civilian contractor died of a heart attack during one of the attacks. 

U.S. officials have blamed Iranian-backed militia forces in Iraq for the attacks. One militia group, the Hezbollah Brigade, demanded that U.S. troops leave Iraq, declaring "Otherwise they will taste the fires of hell."

The Pentagon currently has around 2,500 troops stationed on three bases in Iraq. Their mission is to advise and assist the Iraqi regime to resist efforts by ISIS to take control over the country.

One of the fascinating aspects of this phenomenon is how the U.S. mainstream press considers this situation to be perfectly normal. In news accounts of these attacks, no one in the mainstream press asks the obvious question: What in the world are U.S. troops doing in a country that is almost 7,000 miles from the United States? It's just considered to be a normal part of life in a far-flung military empire that consists of around 900 military bases around the world. 

We shouldn't forget something important though: Those 2,500 troops in Iraq are the outgrowth of the U.S. attack, invasion, war of aggression, and long-term occupation of Iraq some twenty years ago. In that war, the Pentagon was the invader, the attacker, the aggressor, and the occupier of Iraq, a country whose government had never attacked the United States or even threatened to do so.

In other words, in the U.S. war of aggression against Iraq, Iraq was always the defending power. The Pentagon was the attacking power, just as Japan was the attacking power at Pearl Harbor. Thus, while American interventionists still celebrate the courage and heroics of U.S. troops in Iraq, they oftentimes ignore the fact that those troops were part of an illegal and unconstitutional (i.e., no congressional declaration of war) invasion and war of aggression, one that violated the principles set forth by the Nuremberg War Crimes Tribunal under which Nazi officials were prosecuted for war crimes that included invading and waging wars of aggression against other nations.

The Pentagon's objective in invading Iraq was the same as it is with its many other violent regime-change operations — to oust the Iraqi rulers and replace them with U.S. stooges, who would then be expected to do the bidding of Pentagon officials. Ironically, the principal target of this particular regime-change operation was Iraqi dictator Saddam Hussein, who, ironically, had been a partner and ally of the Pentagon during the 1980s, when Iraq was waging its own war of aggression against Iran.