The competition to sell fighters to South Korea intensifies. The Pentagon has officially notified Congress of the potential sale of 60 Boeing F-15 Silent Eagles or 60 Lockheed Martin F-35s to South Korea, as the country weighs these American options against the Eurofighter Typhoon for the forthcoming downselect in its F-X Phase 3 competition.

The notifications came as the Republic of Korea’s Minister of Foreign Affairs, Yun, Byung-Se, met today with U.S. Defense Secretary Chuck Hagel at the Pentagon. Though planned for a selection in June, the formal offerings also are coming as North Korea grows increasingly bellicose with its southern neighbor and the United States.

The U.S. Defense Security Cooperation Agency sent details of the offerings from Boeing and Lockheed Martin to Congress today, April 3.

Details about the sale on both platforms are available here to subscribers of the Aviation Week Intelligence Network.