Background: Edward Randall Royce (born October 12, 1951) is an American politician who currently serves as a member of the United States House of Representatives for California's 39th congressional district, and previously the 40th, serving in Congress since 1993. A member of the Republican Party, Royce became the Chairman of the United States House Committee on Foreign Affairs in 2013. He was re-elected to his seat in 2016, having spent over $3.5 million on his campaign. On January 8, 2018, Royce announced that he will retire from Congress at the end of his current term and not run for re-election in 2018.
Context: On April 26, 2013, Royce introduced the North Korea Sanctions Enforcement Act of 2013 (H.R. 1771; 113th Congress), a bill that would increase U.S. sanctions on North Korea. Royce said that "by shutting down North Korea's illicit activities, we deprive the Kim regime of the money he needs to pay his generals and to conduct nuclear weapons research." Royce also argued that "North Korea is undoubtedly one of the most significant security threats that we here face and our allies face."  On June 27, 2013, Royce introduced the Electrify Africa Act of 2013 (H.R. 2548; 113th Congress), a bill that would direct the President to establish a multiyear strategy to assist countries in sub-Saharan Africa develop an appropriate mix of power solutions to provide sufficient electricity access to people living in rural and urban areas in order to alleviate poverty and drive economic growth.  On November 13, 2013, Royce introduced the Taiwan Relations Act Affirmation and Naval Vessel Transfer Act of 2014 (H.R. 3470; 113th Congress) into the House. The bill would allow the sale of several Oliver Hazard Perry-class frigates to Mexico, Thailand, and Taiwan. Four naval vessels would be sold to Taiwan for about $10 million each. Mexico and Thailand would each receive two vessels as a grant. Royce argued in favor of the bill saying that "these ships would bolster Taiwan's defense." Royce also said that "these transfers help support the priorities of the U.S. Navy while strengthening the capability of allies and our close partners to meet our share maritime security objectives."
Question: Was most of his involement over seas?

Answer:
Mexico