Saudi/GCC rotating troops in what is being called a "long term" operation.

via GulfNews.com

Military experts commended the UAE’s troop rotation tactic in Yemen, announced on Monday, which will see the first batch replaced by another as part of Operation Restoring Hope, saying “it was a positive move, in favour of the coalition forces.”
The military tactic, which is used in military operations the world over, experts told Al Bayan newspaper, aims to revitalise the UAE’s presence in Yemen. They said the decision to replace troops was well-timed, especially since it’s been nearly seven months since the UAE began deploying military forces in Yemen.
The General Command of the UAE Armed Forces on Monday announced that the first batch of Emirati soldiers will be replaced by the second group of soldiers. The rotation comes following many victories, such as the liberation of Marib and retaking the Marib dam, parts of which was rebuilt on behalf of Shaikh Zayed Bin Sultan Al Nahyan.
According to Al Bayan, the second batch will participate in the Arab coalition forces to perform new tasks in Yemen, replacing the first instalment of troops “which was able to achieve several important victories.”
Strategy-analyst Major General Monem Kato said the troop-rotation decision taken by the UAE is a positive move, in favour of the UAE army and the Saudi-led coalition forces in general. “It is a punctual decision,” he told Al Bayan, “especially since the coalition is on the outskirts of the Yemeni capital Sana’a, and is on the verge of liberating it.”

Here.

Wow.  Looks like the Saudis/GCC took advantage of the Tropical Storm that hit Yemen to rotate troops.  I'm really surprised that they didn't take advantage of the storm to launch a new offensive.

Regardless.  This isn't going to be short, nor is it going to be painless for them. They're in a quagmire.