that were part of the deal. Offset deals in 2011 reached $6 billion out of $6.028 billion planned ($9.8 billion at time when offer was chosen), however only one-third of recognised offsets commitment were direct investments in Polish economy. According to a former Polish military defence vice-minister, the offer for JAS 39 Gripen was a better deal. F-16s cost $3.5 billion, compared to 3.2 billion euro for Saab's Gripen, and 3.6 billion euro for Dassault offer, at a time when both currencies had a similar value. Portugal The Portuguese Air Force chose the F-16 during the 1980s to replace its aging and obsolescent LTV A-7 Corsair II attack aircraft which were no longer suitable for air-to-air combat and were facing severe logistical problems. The Portuguese Foreign Military Sales program is known as Peace Atlantis. Peace Atlantis I In August 1990 the government of then-Prime Minister Aníbal Cavaco Silva signed a Letter Of Acceptance (LoA) which lead to the creation of the Peace Atlantis I program. The funds used for the purchase were made available through the Foreign Military Sales program, partly a payment for the use by the United States of Lajes Air Base in the Azores. Initially the United States proposed to supply Portugal with surplus Block 10 aircraft. However this option rested on a first order of 20 newly built F-16 Block 15 OCU (17 A models and three B models) with Pratt & Whitney F100 engines, which made them almost identical to the US Air National Guard's F-16 ADF. Deliveries of this first order began on February 18, 1994, and was completed on July 18 in the same year. The initial group of Portuguese F-16 pilots was constituted by fighter pilots from the 302 and 304 Squadrons, received training in Tucson, Arizona, between January and June 1994. During the War in Kosovo, it was seen that while the Portuguese F-16s were recently obtained, they were no longer up to the same level as most modern fighters used by other NATO countries. In 1999, during the Portuguese participation in the conflict (Operation Allied Force), the three F-16 fighters deployed by Portugal were relegated to escort missions and combat air patrols due to their lack of modern armament and air-to-ground targeting systems. Peace Atlantis II During 1996, during the government of then-Prime Minister António Guterres, new negotiations took place concerning the possible purchase of new F-16 fighters and the