US troops sent to Jordan to counter Syrian attack on kingdom DEBKAfile Special Report April 17, 2013, 10:23 PM
US 1st Armored Division
US Defense Secretary Chuck Hagel announced Wednesday, April 17, that 200 troops of the US 1st Armored Division had been sent to Jordan to give the United States the ability to "potentially form a joint task force [with Jordan] for military operations, if ordered" by the President. DEBKAfile’s military sources report that they are ranged on the Jordanian-Syrian border to counter a potential Syrian attack. In a potential war between Syria and Jordan backed by US troops, Israel would almost certainly become involved.
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http://www.debka.com/article/22904/US-troops-sent-to-Jordan-to-counter-Syrian-attack-on-kingdom