As U.S. and Militias Engage, White House Worries About a Tipping Point

The number of attacks on American troops in the Middle East increases the risk of deaths, a red line that could lead to a wider war.

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President Biden boarding Marine One on Sunday. The latest attack on American troops over the weekend resulted in no deaths, but Mr. Biden and his advisers worry it is only a matter of time.

Another day, another barrage of rockets and another spark that American officials fear could set off a wildfire of violence across the Middle East.

The latest attack on American troops in the region over the weekend resulted in no deaths, but President Biden and his advisers worry that it is only a matter of time. Whenever a report of a strike arrives at the White House Situation Room, officials wonder whether this will be the one that forces a more decisive retaliation and results in a broader regional war.

The assault on American troops based at Al Asad Air Base in western Iraq on Saturday night was by one measure the most successful believed to be carried out by a militia sponsored by Iran since the Hamas terrorist attack on Israel on Oct. 7. Two out of an estimated 17 rockets and short-range ballistic missiles fired at the base made it through air defense systems. An unspecified number of American military personnel were reported injured, but none were said to have been killed.

But it was just the latest in a regular string of relatively low-level assaults that have become a way of life in the Middle East for U.S. forces since the Hamas attack. As of Thursday, Iranian-backed militias had already carried out 140 attacks on American troops in Iraq and Syria, with nearly 70 U.S. personnel wounded, some of them suffering traumatic brain injuries. All but a few have been able to return to duty in short order, according to the Pentagon.

American forces have at times mounted retaliations, but in limited fashion to avoid instigating a full-fledged conflict.

Biden administration officials have regularly debated the proper strategy. They do not want to let such attacks go without a response, but on the other hand do not want to go so far that the conflict would escalate into a full-fledged war, particularly by striking Iran directly. They privately say they may have no choice, however, if American troops are killed. That is a red line that has not been crossed, but if the Iranian-backed militias ever have a day of better aim or better luck, it easily could be.

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