"The State of Qatar has employed its ample financial resources to exert regional influence separate from and independent of Saudi Arabia, the de facto leader of the Gulf Cooperation Council (GCC: Saudi Arabia, Kuwait, Qatar, United Arab Emirates, Bahrain, and Oman), an alliance of six Gulf monarchies. Qatar has intervened in several regional conflicts, including in Syria and Libya, and has engaged both Sunni Islamist and Iran-backed Shiite groups in Lebanon, Sudan, the Gaza Strip, Iraq, and Afghanistan. Qatar has maintained consistent dialogue with Iran while also supporting U.S. and GCC efforts to limit Iran's regional influence."
CRS Report for Congress, R44533
Congressional Research Service: https://crsreports.congress.gov/