On 21 January 2002 Solana said that the detainees at Guantanamo Bay should be treated as prisoners of war under the Geneva Convention. The EU has stated that it hopes to avoid another war like the Iraqi invasion through this and future negotiations, and Solana has said the most difficult moments of his job were when the United Kingdom and France, the two permanent EU Security Council members, were in disagreement. The so-called Vilnius letter, a declaration of support by eastern European countries for the United States' aim of régime change in Iraq, and the letter of the eight, a similar letter from the UK, Italy, and six-second-tier countries, are generally seen as a low-water mark of the CFSP. Solana operated as a quiet diplomat and found himself frequently pushed to the side in negotiations and sent on missions known to be impossible.