Iran invested in the Houthis from the militia's early stages in order to develop a regional proxy that would act in its own interests, experts say.
Regional governments and international organisations have rallied behind Saudi Arabia following the September attacks on its oil facilities.
The Iran-backed militia seized control of Yemeni state institutions by force, so any decision it issues is null and void, a government minister says.
Iranian military support for the Houthis has extended Yemen's devastating war and compounded the suffering of its people, analysts say.
The US is sending troops and missiles to bolster Saudi defenses, while new reports show Iran has again breached the 2015 nuclear deal.
The September 14th attacks on two Aramco oil facilities will backfire on the Iranian regime because it is tampering with the security and economy of the region and the world, experts say.
Satellite images reveal Iranian supertanker Adrian Darya 1 has arrived at the Syrian port of Tartus with a delivery of 2.1 million barrels of oil.
Iran has been violating US sanctions by arranging oil shipments by land and sea via third parties and countries where it has influence.
The IRGC and its affiliates have been expanding Iran's footprint in Syria and cashing in on reconstruction activity in strategic areas.
The Lebanese militia is facing increasing opposition from within the Shia community, with those who hold opposing viewpoints speaking out.