Home2003 Treaties and Agreements ...El Salvador (03-1003) – Agreement for Defense Cooperation hide El Salvador (03-1003) – Agreement for Defense Cooperation TIAS Office of Treaty Affairs October 3, 2003 Defense Agreement effected by exchange of notes at San Salvador August 22 and October 3, 2003; entered into force October 3, 2003. Download Attachment [378 KB] Tags Defense El Salvador Treaties