Russian occupation of Sumy Oblast
The Russian occupation of Sumy Oblast was a military occupation that began on 24 February 2022, when Russian forces invaded Ukraine and began capturing parts of the Sumy Oblast. The capital of the Oblast, Sumy, was never captured by Russian forces, however, other cites were captured including Konotop and Trostianets. On 6 April, Russian forces left the oblast, ending its military occupation. Occupation

Konotop 
On 25 February, Russian forces captured the city of Konotop,  from the Russian border. On 2 March, Artem Seminikhin, the mayor of Konotop, stated that Russian forces in the city warned him that they would shell the city if the residents resisted them. Russian vehicles, deployed outside the City Council, were surrounded by locals. Seminikhin asked the residents of the city whether they wanted to fight or surrender, whereupon the residents "overwhelmingly" refused to surrender. Later in the day, city authorities negotiated with Russian forces, with talks lasting 12 minutes. An agreement was reached under which Russian forces accepted not to change the city's government, deploy troops in the city, obstruct transportation, or remove the Ukrainian flag. In return, the city officials agreed that the residents would not attack Russian forces. On 7 March, the Ukrainian General Staff assessed that Russian forces at Konotop had taken 50 percent losses and were forced to regroup and resupply. On 15 March, Ukrainian and Russian forces agreed to open a humanitarian corridor to evacuate citizens from Konotop. On 28 March, Russian forces destroyed a bridge in Konotop. On 2 April, it was reported that the Russian army maintained a corridor in Konotop Raion through which equipment from Kyiv and Chernihiv could be withdrawn to Russia. On 3 April, Ukrainian MP  stated on Twitter that all Russian forces had left Konotop Raion. On 4 April 2022 Sumy Oblast's Governor Dmytro Zhyvytskyi stated that Russian troops no longer occupied any towns or villages in Sumy Oblast and had mostly withdrawn, while Ukrainian troops were working to push out the remaining units. On 5 April, Governor Zhyvytsky stated that the bodies of at least three tortured civilians had been found in the Konotop Raion. Romny Raion 
On the evening of February 24, the first day of the Russian invasion, two convoys of Russian soldiers coming from the cities of Nedryhailiv and Konotop (east and north of Romny, respectively) made their way in the direction of Romny. Between February 26 and 27, more Russian vehicles headed towards Romny from Krasnopillia, bypassing Sumy. According to the head of Romny Raion, Denis Vashchenko, there were no wounded, killed, or shelling during this time. The second convoy was bombed by Ukrainian forces before it reached Romny. On February 28, Russian forces attacked the Romny Correctional Colony. Meanwhile that same day, Russian forces crushed a civilian in the village of Pogozha Krynytsia when he attempted to use his car to block Russian tanks passing through. On the first day of March, Russian forces captured the villages of Bilovods'ke and Bobryk, just south of Romny, which had been contested in previous days. On March 4, after negotiations with Russia and Ukraine, Romny was selected as a humanitarian corridor for civilians fleeing Sumy, Kharkiv, and Chernihiv oblasts. That same day, civilians from the village of Spartak attempted to block Russian vehicles passing from Nedryhailiv to Romny. They succeeded in blocking the road, although an ensuing attack by the Russians resulted in one civilian dying. Later that evening on March 4, Russian forces blocked the road from Lypova Dolyna towards Romny and Bilovod'ske, in southern Romny Raion, while the highway between Nedryhailiv and Romny was still under Ukrainian control. During the night between March 4 and 5, Russian soldiers destroyed a poultry farm, killed around 100,000 poultry and causing an estimated one million hryvnias worth of damage. On March 5, three out of four hostages who were taken by Russian troops were released, according to Vashchenko. That same day, Russian soldiers standing on the road fired at Ukrainian TDF troops at a gas station, leaving one Ukrainian soldier killed and two wounded. On the evening of March 5, Russian soldiers fired at two cars traveling from Sumy to Romny, in the village of Pustovyitivka. 3 civilians were wounded, and one civilian was killed in the shooting. Later that evening, in the village of Skripali' in Romny raion, Ukrainian forces destroyed a Russian column, and killed an unspecified number of soldiers. In the evening between March 5 and 6, shots were fired in Pustoviitivka and Romny, with no injuries. The shooting in Romny, however, knocked out electricity for parts of the town. On March 11, Vashchenko reported that Ukrainian forces unblocked the road between Romny and Lokhvytsia, allowing civilians to flee southwards. That morning near Romny, police and Ukrainian TDF discovered and detained 29 Russian soldiers in a field, all of whom claimed to be lost. The next day on March 12, green corridors were established in Sumy Oblast, where civilians from Sumy, Trostianets, Konotop, Lebedyn, Velyka Pisaryvka, and Krasnopillia could flee towards Poltava Oblast. Humanitarian corridors restarted again on March 18. The Ukrainian General Staff reported on March 19 that the 1st Guards Tank Army of Russia began to concentrate efforts on surrounding Sumy, while also attempting offensives in Trostianets, Pryluky, and Romny, although these offensives did not succeed. Okhtyrka 
In Okhtyrka, by April 21, only 24,000 of the town's original population of 48,000 were left. Residents of Trostianets who survived the occupation stated that as soon as the Russian forces got there, they began firing upon Okhtyrka. Despite never entering the town, much of Okhtyrkha was destroyed in bombing raids carried out by the Russian army. Trostianets 
On 1 March, Russia forces captured the city of Trostianets and began a military occupation of the city.The first wave of Russians into Trostianets were younger recruits, who passed by quickly. A second wave of both Russians and separatists, who were more aggressive, entered in mid-March. The Russian military headquarters was established at the town's main train station. Approximately 800 Russian troops occupied the city. During the occupation, Ukrainian police officers remained in the city incognito, supporting both local civilians and partisan forces operating in the area. Ukrainian forces destroyed a bridge to the south of the city, stalling the Russian advance deeper into Ukraine. The town's mayor, Yuriy Bova, hid in nearby villages, receiving some criticism for his decision not to stay in town, but continued to coordinate Ukrainian resistance, including shelling of Russian positions. Reports of executions of civilians by Russian troops began in early March. Residents in Trostianets during occupation stated that people were shot in the streets, and Russian soldiers stole belongings from the houses of the elderly. Dmytro Zhyvytskyi, governor of Sumy Oblast, stated that Russian troops in Trostianets laid mines everywhere, including the town cemetery. Unless neighbors or other civilians carried in the bodies of the dead, they would be left in the streets. These included the bodies of dead Russian troops, who were left there following the Russian retreat in April. Ukrainian counterattack
A Ukrainian counter-offensive beginning on 23 March recaptured the city by 26 March. During the fighting, the town's hospital was shelled, with residents blaming Russian forces. After combat and shelling around the outskirts of the city, Russian troops largely withdrew overnight before the arrival of Ukrainian forces. An AFP report recorded "a dozen" destroyed or damaged tanks and armored vehicles. The New York Times reported that food had grown scarce by the time the city was recaptured by Ukraine. On 7 April, Dmytro Zhyvytskyi, governor of Sumy Oblast, said that all Russian troops had left the region, but it was still unsafe due to rigged explosives and other ammunition Russian troops had left behind. Control of cities

See also 

 Russian-occupied territories of Ukraine
 Russian occupation of Crimea
 Russian occupation of Chernihiv Oblast
 Russian occupation of Dnipropetrovsk and Poltava Oblasts
 Russian occupation of Donetsk Oblast
 Russian occupation of Kharkiv Oblast
 Russian occupation of Kherson Oblast
 Russian occupation of Kyiv Oblast
 Russian occupation of Luhansk Oblast
 Russian occupation of Mykolaiv Oblast
 Russian occupation of Zaporizhzhia Oblast
 Russian occupation of Zhytomyr Oblast
 Snake Island during the 2022 Russian invasion of Ukraine
 Annexation of Crimea by the Russian Federation
 Russian annexation of Donetsk, Kherson, Luhansk and Zaporizhzhia oblasts

Further reading 
"Weren't you scared when you captured Donbas?" After a month of Russian occupation, Trostyanets recovers - Babel

References 

Sumy
February 2022 events in Ukraine
March 2022 events in Ukraine
April 2022 events in Ukraine
Sumy
History of Sumy Oblast
Konotop