Comment: I think

(See in situ)

I think

it is to train "rebels" for Syria. Jordanian king might also asked some help for himself, since Jordanian king (ethnic Saudi) does not have much support from his own people (most of those are ethnic "Palestinians" - Beduin Arabs from Egypt and Ottoman empire who settled down in 19th-20th centuries.) With many refugees from Syria, Jordanian king might want to boost his personal security.