Home2018 Treaties and Agreements ...Ukraine (18-613) – Agreement Concerning Defense Cooperation hide Ukraine (18-613) – Agreement Concerning Defense Cooperation TIAS Office of Treaty Affairs June 13, 2018 Defense: Cooperation Agreement effected by exchange of notes at Kyiv May 18, 2017 and June 13, 2018; entered into force June 13, 2018. Download attachment [637 KB] Tags Defense Treaties Ukraine