The conflict between Armenian and Azerbaijani forces in Nagorno-Karabakh (also known as the Republic of Artsakh) escalated on 27 September, when Baku declared a "counter-offensive operation" in the breakaway republic. Armenia declared full mobilisation, and Azerbaijan partial mobilisation, with numerous clashes between their forces occurring in the area.
The Nagorno-Karabakh conflict began in 1991 when the predominantly Armenian-populated region proclaimed independence from Azerbaijan also stating it planned to join Armenia. Baku and Yerevan waged a full-scale war for the area between 1992 and 1994, leading to the deaths of around 40,000 troops and civilians on both sides.
A ceasefire was mediated by the OSCE Minsk Group in 1994, but the conflict remained frozen, and the self-proclaimed Nagorno-Karabakh Republic still continues to be an unrecognised state.
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