President Moon Jae-in arrived in Seoul Saturday morning following a three nation tour to the Middle East and North Africa.
The trip was largely focused on bolstering defense and energy cooperation.
South Korea agreed a deal to sell mid-range surface-to-air missiles to the UAE, a deal expected to be the largest single weapons contract in the country's defense history at 3.5 billion U.S dollars.
While in Egypt, Seoul and Cairo held negotiations to export South Korea’s K9 Thunder self-propelled howitzers, believed to be worth about 1.6 billion dollars.
The two sides agreed to work toward a conclusion.
In Saudi Arabia, several MOUs were inked, allowing Seoul to secure supplies of hydrogen and ammonia from Riyadh, while South Korea will help build hydrogen-related facilities in Saudi Arabia.
Seoul will also resume free trade talks with the Gulf Cooperation Council, which is comprised of Saudi Arabia, the UAE, Bahrain, Oman, Qatar and Kuwait.