Four days of inter-ethnic clashes broke out in Baku, Azerbaijan, resulting in about 12,000 deaths.

The March Days or March Events was a period of inter-ethnic strife and clashes which took place between 30 March – 2 April 1918 in the city of Baku and adjacent areas of the Baku Governorate of the Transcaucasian Commissariat.

Baku is the capital and largest city of Azerbaijan, as well as the largest city on the Caspian Sea and in the Caucasus region. Baku is 28 metres (92 ft) below sea level, which makes it the lowest lying national capital in the world and also the largest city in the world below sea level. Baku lies on the southern shore of the Absheron Peninsula, on the Bay of Baku. Baku's urban population was estimated at two million people as of 2009. Baku is the primate city of Azerbaijan—it is the sole metropolis in the country, and about 25% of all inhabitants of the country live in Baku's metropolitan area.