Home2018 Treaties and Agreements ...Qatar (18-214) – Agreement Concerning Defense Articles hide Qatar (18-214) – Agreement Concerning Defense Articles TIAS Office of Treaty Affairs February 14, 2018 Defense Agreement effected by exchange of notes at Doha March 13, 2017, February 14, 2018 and July 26, 2018; entered into force February 14, 2018. Download attachment [954 KB] Tags Defense Qatar Treaties