I'm fairly confident that this "mysterious new force" is exactly what everyone suspects it is: a group of pro-Hadi Yemeni nationals trained by Saudi Arabia and other GCC countries and then dumped back into Aden by the Saudis or their allies.
How do I know? I don't, except that most times that a shadowy new force appears in a conflict and everyone says "they look there's a shadowy new force! We aren't sure where they came from, but we suspect it might be X" the X that everyone guessed turned out to be true. Remember the "little green men" in Crimea?
How do I know? I don't, except that most times that a shadowy new force appears in a conflict and everyone says "they look there's a shadowy new force! We aren't sure where they came from, but we suspect it might be X" the X that everyone guessed turned out to be true. Remember the "little green men" in Crimea?