The U.S. conducted five airstrikes in Syria on Sunday and Monday, along with Arab military forces, marking the first appearance by Arab partners in the air campaign since Oct. 19.

Military officials said that the U.S. relationship with Arab partners remains unchanged, adding that Arab nations with smaller militaries face logistical and operational challenges in launching strikes as often as the U.S. can.

The smaller Arab militaries, an official said, have fewer planes and require longer periods to reset those planes after a strike. […]