Military conflicts similar to or like War in Donbass

Protracted conflict between Russia and Ukraine that began in February 2014. The war has centered around the status of the Ukrainian regions of Crimea and Donbass. Wikipedia

From the end of February 2014, demonstrations by pro-Russian and anti-government groups took place in major cities across the eastern and southern regions of Ukraine, in the aftermath of the Euromaidan movement and the 2014 Ukrainian revolution. Annexed by the Russian Federation after a Russian military intervention, and an internationally criticized (based on UN resolution 68/262) Crimean referendum. Wikipedia

Umbrella name for the militias and armed volunteer groups affiliated with the unrecognized political union called Novorossiya (New Russia). It consists of the Donbass People's Militia, the Luhansk People's Militia and autonomous armed groups. Wikipedia

The Battle of Ilovaisk started on 7 August 2014, when the Armed Forces of Ukraine and pro-Ukrainian paramilitaries began a series of attempts to capture the city of Ilovaisk from pro-Russian insurgents affiliated with the self-proclaimed Donetsk People's Republic (DPR) and detachments of the Russian Armed Forces. Although Ukrainian forces were able to enter the city on 18 August, they were encircled between 24 and 26 August by overwhelming Russian military forces that crossed the border, joining the battle. Wikipedia

Agreement to halt the war in the Donbass region of Ukraine, signed by representatives of that country, the Russian Federation, the Donetsk People's Republic , the Luhansk People's Republic (LPR), and the Organization for Security and Co-operation in Europe (OSCE) on 5 September 2014. Signed after extensive talks in Minsk, Belarus, under the auspices of the OSCE. Wikipedia

Operation by the Armed Forces of Ukraine to recapture the city of Sloviansk in Donetsk Oblast from pro-Russian insurgents who had seized it on 12 April 2014. Taken back on 5 July 2014 after shelling from artillery and heavy fighting. Wikipedia