Armenia established its Ministry of Defence on 28 January 1992. The border guards subject to the Ministry, patrol Armenia's borders with Georgia and Azerbaijan, while Russian troops continue to monitor its borders with Iran and Turkey.Eaton, Mark. "Major Trends in Military Expenditure and Arms Acquisitions by the States by the States of the Caspian Region" in The Security of the Caspian Sea Region. Gennadii Chufrin (ed.) Oxford: Oxford University Press, 2001, pp. 89-90.