A guy I know was a US advisor to a Saudi armored unit probably 25-30 years ago at this point. He has literal scars from an encounter with Yemeni armor back then.
The point being, KSA fighting the Yemenis is nothing new.
Glad you said that. I was there 50 years ago! The SA National Guard and Army were NOTHING but fluff!
Poor SA leaders with men from Jordan.
The attack on Riyadh by Yemen marked the 3 Year Anniversary of KSA attacking Yemen.