Home1999 Treaties and Agreements ...Turkmenistan (99-424) – Defense Assistance Agreement hide Turkmenistan (99-424) – Defense Assistance Agreement TIAS Office of Treaty Affairs April 24, 1999 Defense: Assistance Effected by Exchange of Notes at Ashgabat April 5 and April 24, 1999; Entered into force April 24, 1999. Download attachment [344 KB] Tags Defense Treaties Turkmenistan