Kuwait is yet another major Saudi ally in the Gulf, as it participates in major interventions, such as in Yemen and Syria. When Kuwait was invaded by Iraq, Saudi Arabia, Bahrain, and the rest of Gulf Countries except Iran intervened. However, it didn't sever ties with Qatar in 2017, unlike the rest of the GCC except Oman. Kuwait, along with Oman, the United States, and Lebanon, mediated the Qatar diplomatic crisis.