Garadaghli is a village in the Iravan uezd of the former Iravan governorate, later in the former Gamarli (Artashat) district, and currently in the Ararat province. It was marked on the five-verst map of the Caucasus. Historically, the village was inhabited by Azerbaijanis. Armenians were settled there from the Khoy and Salmas provinces of Iran in 1828–1830, from the Alashkirt and Diadin provinces of Türkiye in 1829, and from the Mush and Sasun provinces in 1870.

Along with the Armenians, the village was inhabited by 128 Azerbaijanis in 1831, 331 in 1873, 286 in 1886, 364 in 1897 and 360 Azerbaijanis in 1919. In late 1919, the Azerbaijanis were exposed to aggression by Armenian armed forces, massacred and deported. Following the establishment of Soviet power in present-day Armenia, the surviving villagers managed to return to their homeland. The village was inhabited by 152 Azerbaijanis in 1922, 163 in 1926 and 105 Azerbaijanis in 1931. In accordance with the decision of the USSR Council of Ministers “On the resettlement of collective farmers and other Azerbaijani population from the Armenian SSR to the Kur-Araz lowland of the Azerbaijan SSR” dated 23 December 1947, the Azerbaijani population of the village was forcibly deported to Azerbaijan. Currently, the village is inhabited only by Armenians.

The toponym was formed on the basis of the name of the Garadaghli tribe of the Gizilbash.

By the decree of the Presidium of the Supreme Soviet of the Armenian SSR dated 20 August 1945, the name of the village was changed to “Tsakhkashen”, and by decision dated 20 October 1967, it was renamed “Mrgavet”. According to the law “On the administrative-territorial division of the Republic of Armenia” dated 7 November 1995, it was integrated into the administrative territory of the Ararat province.

Geographical coordinates: latitude: 40°01’ N., longitude: 44°28’ E.