Today the United Arab Emirates airforce bombed the Yemeni proxy forces of its 'ally' Saudi Arabia:
Yemen's internationally recognized government accused the Emirati air force of attacking its troops Thursday as they were heading to the key southern port city of Aden to fight separatists backed by the United Arab Emirates. The airstrikes killed at least 30 government forces, a Yemeni commander said.
Col. Mohamed al-Oban, a commander of the government's special forces in Abyan province, said the troops were on the road, headed from Abyan toward Aden on Thursday, when the strikes took place, killing at least 30.
At least six raids were carried out by Emirati warplanes around the temporary capital, according to government military sources who asked to remain anonymous.
Southern separatist forces under the Southern Transitional Council and supported by the UAE hold Aden. Between 1967 and 1990 south Yemen, then named the People's Democratic Republic of Yemen, was separated from the mountainous north. After uniting with north Yemen the south became neglected even though its eastern desert holds most of the country's hydrocarbon resources.
Since 2015 the coalition of Saudi Arabia and the UAE, with US and British help, waged war against the Houthi in northern Yemen. The coalition is now falling apart. Both countries claimed to fight against the Houthi, which control the capital Sanaa, in support of the internationally recognized 'legitimate' government under 'President' Hadi. But both countries had from the very beginning more egoistic war aims.
The Wahhabi Saudis want a Yemeni government that is not controlled by the Zaydi-Shia Houthi with whom they fought dozens of wars over two provinces that Saudi Arabia once annexed. They also want to control Yemen's oil and a pipeline from the Saudi oil region to a harbor in Yemen. It would help Saudi oil exports to avoid the Iran controlled Strait of Hormuz.
The UAE is big into the port business. It wants to control the strategic port of Aden and other Yemeni harbors on the southern coast. As it has no direct border with Yemen it largely does not care who controls the rest of Yemen.
The UAE leader Mohammad bin Zayed (MbZ) is not an absolute king. He is the son of the Emir of Abu Dhabi, one of the seven emirates that form the UAE. His aggressive foreign policy, with military engagement in Yemen, Sudan, Somalia and Libya, has come under criticism of the rulers of the other emirates. Wars are expensive and bad for regular business. MbZ's alliance with the Saudi clown prince Mohammad bin Salman (MbS) was seen as dangerous. While the Saudis would like the US to wage war on Iran, the UAE, and especially Dubai, would become a casualty of such a war.
In June the emirs decided to change cause. The UAE retreated from active war in Yemen and started to make nice with Iran. It hoped that the southern separatists it had trained would keep Aden under control and continue to do the UAE's bidding. The Saudis and the 'legitimate government' under Hadi they control do not want to condone that.