Eastern Ukraine or East Ukraine (Ukrainian: Східна Україна , "Skhidna Ukrayina"; Russian: Восточная Украина , "Vostochnaya Ukraina") generally refers to territories of Ukraine east of the Dnieper river, particularly Kharkiv, Luhansk and Donetsk oblasts.
 Dnipropetrovsk and Zaporizhia Oblasts sometimes are also regarded as Eastern Ukraine.
 In regard to traditional territories the area encompasses portions of the southern Sloboda Ukraine, Donbas, the western Azov Littoral (Pryazovia).
Somalia Battalion (Russian: Батальон «Сомали» ) is one of the military units of the self-proclaimed Donetsk People's Republic in Ukraine which participates in the ongoing War in Donbass against Ukrainian army.
 The battalion's full name is 1st Separate Tank Battalion Somalia (previously 1st Separate Tactical Battalion Group Somalia).
 The battalion took the name "Somalia" because, according to its former commander Mikhail Tolstykh alias Givi, its members are as fearless as Somalis .
Eastern Galicia, or Eastern Halychyna (Ukrainian: Східна Галичина ) is a geographical region in Western Ukraine (present day oblasts of Lviv, Ivano-Frankivsk and Ternopil) and Poland that has historic importance.
 Galicia was formed within the Austrian Empire during the years 1772-1918.
 Eastern Galicia now includes all of the Lviv and Ivano-Frankivsk Oblasts (regions) of Ukraine as well as Ternopil Oblast, with its northern strip bordering the Raions of Kremenets, Shumsk and Lanivtsi and the northern part of Zbarazh Raion.
 The area of Eastern Galicia is about 46,800 km (18,100 sq miles).
Mykola Ivanovich Mikhnovsky (March 31, 1873 – May 3, 1924) was a Ukrainian political and social activist, lawyer, journalist, founder, ideologue and leader of a Ukrainian independence movement in the late 19th - early 20th century.
 Author of the pamphlet "Independent Ukraine", one of the organizers of the Ukrainian army, co-founder of the first political party in East Ukraine - Revolutionary Ukrainian Party (RUP), the leader of the Ukrainian People's Party, co-founder of the Ukrainian Democratic Party, a member of the Brotherhood for Self-determination.
The War in Donbass is an armed conflict in the Donbass region of Ukraine.
 From the beginning of March 2014, protests by pro-Russian and anti-government groups took place in the Donetsk and Luhansk oblasts of Ukraine, together commonly called the "Donbass", in the aftermath of the 2014 Ukrainian revolution and the Euromaidan movement.
 These demonstrations, which followed the annexation of Crimea by the Russian Federation, and which were part of a wider group of concurrent pro-Russian protests across southern and eastern Ukraine, escalated into an armed conflict between the separatist forces of the self-declared Donetsk and Luhansk People's Republics (DPR and LPR respectively), and the Ukrainian government.
 In the Donetsk People's Republic, from May 2014 to a change of the top leadership in August 2014, some of the top leaders were Russian citizens.
 During the middle of 2014, Russian paramilitaries were reported to make up between 15% and 80% of the combatants.
Pavlo Petrovych Skoropadskyi (Ukrainian: Павло Петрович Скоропадський ; Russian: Павел Петрович Скоропадский , "Pavel Petrovič Skoropadskij " ; German: "Paul Petrowitsch Skoropadskyj" ; 3 May 1873 – 26 April 1945) was a Ukrainian aristocrat, military and state leader, decorated Imperial Russian Army and Ukrainian Army general of Cossack heritage.
 Skoropadsky became a conservative leader in Ukraine following the Russian Revolution of 1917, a founder of a hetman dynasty and Hetman of Ukraine.
"Schutzmannschaft" Battalion 118 of Ukrainische Hilfspolizei was a "Schutzmannschaft" auxiliary police battalion (Schuma) formed by the Nazis in the spring of 1942 in Kiev in "Reichskommissariat Ukraine" (now capital of sovereign Ukraine) with 500 volunteers in three companies.
 The battalion was split away from the Schuma Battalion 115 with 100 members of the third company of the Ukrainian-only Battalion 115 forming the first company of Battalion 118.
 Additional two new companies were composed of Ukrainian nationalists from Bukovyna and volunteers from the prisoners-of-war camp for the Soviets captured in Ukraine during Operation Barbarossa.
 The German commander of the battalion was "Sturmbannführer" Erich Körner.
Hnat Stefaniv (1895–1949) was a colonel of the Ukrainian Galician Army and the army of the UNR.
 Born in the village of Topoivtsi near Horodenka, Stefaniv rose to the rank of major in the Austro-Hungarian army.
 In the November retreat of 1918 he was the organizor and commendant of the Zolochiv area in the Western Ukrainian National Republic.
 From November 9 to December 10.
 In 1918 he was elevated to the rank of colonel and commanded the Ukrainian Army i Lviv.
 Under his leadership the Ukrainian forces fought the Polish forces in Lviv, but after the arrival of reinforcement were forced to leave the city November 22.
 Later he joined the army of the UNR where he commanded the Hutsul regiment, the additional brigade of the rifleman's division and the commander of the cavalry in the First Winter campaign.
 In 1920 he became the commander in exile of the Ukrainian armies.
 In 1920 he went over with a group under General Anton Kraus to Czechoslovakia and there headed the diplomatic mission of the WUKR in Uzhhorod.
 Until 1939 he lived in Transcarpathia, then in Vienna, and Germany (from 1944) where he died.
A prolonged crisis in Ukraine began on 21 November 2013, when then-president Viktor Yanukovych suspended preparations for the implementation of an association agreement with the European Union.
 This decision resulted in mass protests by its proponents, known as the "Euromaidan".
 After months of such protests, Yanukovych was ousted by the protesters on 22 February 2014, when he fled the Ukrainian capital city of Kiev.
 Following his ousting, unrest enveloped the largely Russophone eastern and southern regions of Ukraine, from where he had drawn most of his support.
 An ensuing political crisis and Russian military intervention in the Ukrainian autonomous region of Crimea resulted in the annexation of Crimea by Russia on 18 March 2014.
 Subsequently, unrest in Donetsk and Luhansk oblasts of Ukraine evolved into a war in Donbass between the post-revolutionary Ukrainian government and pro-Russian insurgents, supported and often assisted by the Russian military and Russian special forces.
Arsen (Arseny) Sergeyevich Pavlov (Russian: Арсе́н Серге́евич Па́влов ; 2 February 1983 – 16 October 2016), known by his "nom de guerre" Motorola (Моторо́ла), was a Russian citizen who led the Sparta Battalion, an armed group fighting the Ukrainian army, in the ongoing War in Donbass.

Question: In which oblasts of Ukraine did the Sparta Battalion fight the Ukrainian army?
Answer: Donetsk and Luhansk