So, what exactly is going on between Wahhabi Saudi Arabia and the poorest Arab country in the Middle East?

Good informative read if you care to learn a teeny-weeny bit of the jigsaw puzzle that is the disaster created by Saudi Arabia and its pals.

Miriam Goldman writing at NationalInterest
What's Going on along the Saudi-Yemeni Border? 
Divergent Saudi and Houthi reports on fighting along the Yemen-Saudi Arabia border give rise to an opaque understanding of what is actually going on.

July 24 marked the fifth consecutive day that Saudi sources confirmed cross-border incidents in the country’s southern border provinces. On that day, not only were clashes reported at the al-Tuwal border crossing, but the landing of projectiles occurred in both the Jazan and Najran Provinces. Similar incidents were reported from July 20-23, including another attack at the al-Tuwal crossing that was reportedly thwarted on July 22.

Five days in a row of such cross-border attacks certainly represents an uptick of violence, particularly given the more severe nature of some of the incidents. This may be attributed to an interest by Houthi and pro-Saleh forces in presenting a show of strength amid substantial losses in Aden and reports of continued advances by anti-Houthi forces in the Lahij Governorate.

That being said, cross-border incidents appear to be relatively routine in the border area, even if one takes into account the drastically different pictures presented by opposing sides.

The majority of the incidents reported about in Saudi media, including social media sources that claim to be based in these southern areas, occur quite near the border area. Dhahran al-Janub, for example, which saw material damage result from shelling on July 21 is less than 15 kilometers from the border with Yemen. There are some projectiles that cause casualties and/or material damage, usually when they hit population centers, while others (many) land in underpopulated areas or open spaces. Reports indicate that “dozens” of civilians and military personnel have been killed in such incidents, but in the context of the apparent frequency of cross-border fire and length of the conflict, this is a relatively low number.

On the other hand, Houthi-affiliated media like Al-Masirah TV issues multiple claims each day regarding the successful targeting of southern Saudi Arabia. While largely involving the firing of mortars and rockets, this has also included videos allegedly depicting the entrance of fighters into Saudi territory near the border. Some clearly corresponds to those reported by Saudi sources, while others remain uncorroborated.

Iran, for its part, reiterates many of or similar claims. ........