Black Sea Fleet in the context of "Ukrainian Naval Aviation"

Sevastopol (/ˌsɛvəˈstoʊpəl, sɪˈvæstəpoʊl/ SEV-ə-STOH-pəl, siv-AST-ə-pohl), sometimes written Sebastopol, is the largest city in Crimea and a major port on the Black Sea. Due to its strategic location and the navigability of the city's harbours, Sevastopol has been an important port and naval base throughout its history. Since the city's founding in 1783, it has been a major base for Russia's Black Sea Fleet. During the Cold War of the 20th century, it was a closed city. The total administrative area is 864 square kilometres (334 sq mi) and includes a significant amount of rural land. The urban population, largely concentrated around Sevastopol Bay, is 479,394, and the total population is 547,820.

Sevastopol, along with the rest of Crimea, is internationally recognised as part of Ukraine, and under the Ukrainian legal framework, it is administratively one of two cities with special status (the other being Kyiv). However, it has been occupied by Russia since 27 February 2014, before Russia annexed Crimea on 18 March 2014 and gave it the status of a federal city of Russia. Both Ukraine and Russia consider the city administratively separate from the Autonomous Republic of Crimea and the Republic of Crimea, respectively. The city's population has an ethnic Russian majority and a substantial minority of Ukrainians and Crimean Tatars.

Sevastopol Marine Trade Port (SMTP) is a port in Sevastopol. It is located mainly at the Bay of Sevastopol, and at smaller bays around the Heracles peninsula. The port infrastructure is fully integrated with the city of Sevastopol and naval bases of the Russian Navy and the Black Sea Fleet.

The port had previously been under the sovereignty of Ukraine following the dissolution of the Soviet Union in 1991 and a formal partition treaty was signed by Ukraine and Russia in 1997. Portions of the port were owned by the private sector.. The port came under full Russian control when Russia occupied the Crimean peninsula in early 2014 after a highly criticized referendum known as the 2014 Crimean status referendum.

The Sevastopol Naval Base (Russian: Севастопольская военно-морская база; Ukrainian: Севастопольська військово-морська база) is a naval base located in Sevastopol, in the disputed Crimean Peninsula. The base is used by the Russian Navy, and it is the main base of the Black Sea Fleet. Internationally, the base is recognised as part of Ukrainian territory under Russian occupation.

In the Russian Federation, a city of federal importance (Russian: город федерального значения, romanized: gorod federalnogo znacheniya), also known as a federal city, is a city that has a status of both an inhabited locality and a constituent federal subject. Russia has three federal cities: Moscow, Saint Petersburg, and Sevastopol, which was annexed in 2014 but remains internationally recognised as part of Ukraine.

Moscow and Saint Petersburg are the largest cities in the country: Moscow is the national capital and Saint Petersburg is a former Russian capital and an important port city by the Baltic Sea. Currently, Sevastopol houses the Sevastopol Naval Base, the main port of the Russian Black Sea Fleet.

The Crimean campaign was conducted by the Axis as part of Operation Barbarossa during World War II. The invading force was led by Germany with support from Romania and Italy, while the Soviet Union took up defensive positions throughout the Crimean Peninsula. The Axis offensive routed the Red Army and enabled the three-year-long German occupation of Crimea.

Beginning on 26 September 1941, the German 11th Army and the Romanian Third Army and Fourth Army were involved in the fighting. They were opposed by the Soviet 51st Army and elements of the Black Sea Fleet. After the campaign, Crimea was occupied by Germany's Army Group A, with the 17th Army as a major subordinate formation.

The Soviet Navy (Russian: Военно-морской флот (ВМФ) СССР, romanized: Voyenno-morskoy flot (VMF) SSSR) was the naval warfare uniform service branch of the Soviet Armed Forces. Often referred to as the Red Fleet, the Soviet Navy made up a large part of the Soviet Union's strategic planning in the event of a conflict with the opposing superpower, the United States, during the Cold War (1945–1991). The Soviet Navy played a large role during the Cold War, either confronting the North Atlantic Treaty Organization in western Europe or power projection to maintain its sphere of influence in eastern Europe.

The Soviet Navy was divided into four major fleets: the Northern, Pacific, Black Sea, and Baltic Fleets, in addition to the Leningrad Naval Base, which was commanded separately. It also had a smaller force, the Caspian Flotilla, which operated in the Caspian Sea and was followed by a larger fleet, the 5th Squadron, in the Mediterranean Sea. The Soviet Navy included Naval Aviation, Naval Infantry, and the Coastal Artillery.

Admiral Alexander Vasilyevich Kolchak (Russian: Алекса́ндр Васи́льевич Колча́к; 16 November [O.S. 4 November] 1874 – 7 February 1920) was a Russian navy officer and polar explorer who led the White movement in the Russian Civil War. When he assumed the title of Supreme Ruler of Russia in 1918, Kolchak headed a military dictatorship, which ruled over the territory of the former Russian Empire controlled by the Whites. He was a proponent of Russian nationalism and militarism, and opposed democracy as a principle which he believed was tied to pacifism, internationalism, and socialism.

Kolchak served in the Imperial Russian Navy and fought in the Russo-Japanese War and World War I. The son of a naval artillery officer, he graduated from the Naval Cadet Corps and went on to become an accomplished oceanographer and Arctic explorer. He was involved in several expeditions to northern Russia, including to the New Siberian Islands, and became the youngest vice admiral in the Imperial Navy. He was wounded and taken prisoner during the Russo-Japanese War at the Siege of Port Arthur. When he returned to Russia he lobbied the State Duma to strengthen the fleet by introducing submarines and aircraft. Kolchak was the Baltic Fleet Chief of Operations when World War I broke out and was made the Commander of the Black Sea Fleet shortly before the February Revolution. When Emperor Nicholas II asked the commanders of each army group and fleet for their opinion on whether he should abdicate the throne, Kolchak was the only one who opposed the move.

The Siege of Sevastopol, also known as the Defence of Sevastopol (Russian: Оборона Севастополя, romanized: Oborona Sevastopolya) or the Battle for Sevastopol (German: Schlacht um Sewastopol;Romanian: Bătălia de la Sevastopol; Russian: Битва за Севастополь, romanized: Bitva za Sevastopol'), was a military engagement that took place on the Eastern Front of the Second World War. The campaign was fought by the Axis powers of Germany and Romania against the Soviet Union for control of Sevastopol, a port in Crimea on the Black Sea. On 22 June 1941, the Axis invaded the Soviet Union during Operation Barbarossa, with Axis land forces reaching the Crimean peninsula in the autumn of 1941 and overrunning most of the area. The only objective not in Axis hands was Sevastopol. Several attempts were made to secure the city in October and November 1941. A major attack was planned for late November, but heavy rains delayed it until 17 December 1941. Under the command of Erich von Manstein, Axis forces were unable to capture Sevastopol during this first operation. Soviet forces launched an amphibious landing on the Crimean peninsula at Kerch in December 1941 to relieve the siege and force the Axis to divert forces to defend their gains. The operation saved Sevastopol for the time being, but the bridgehead in eastern Crimea was eliminated in May 1942.

After the failure of their first assault on Sevastopol, the Axis opted to conduct siege warfare until the middle of 1942, at which point they attacked the encircled Soviet forces by land, sea, and air. On 2 June 1942, the Axis began this operation, codenamed Störfang (Sturgeon Catch). The Soviet Red Army and Black Sea Fleet held out for weeks under intense Axis bombardment. The German Air Force (Luftwaffe) played a vital part in the siege, its 8th Air Corps bombing the besieged Soviet forces with impunity, flying 23,751 sorties and dropping 20,528 tons of bombs in June alone. The intensity of the German airstrikes was far beyond previous German bombing offensives against cities such as Warsaw, Rotterdam or London. At the end of the siege, there were only 11 undamaged buildings left in Sevastopol. The Luftwaffe sank or deterred most Soviet attempts to evacuate their troops by sea. The German 11th Army suppressed and destroyed the defenders by firing 46,750 tons of artillery ammunition on them during Störfang.

The Partition Treaty on the Status and Conditions of the Black Sea Fleet consists of three bilateral agreements between Russia and Ukraine signed on 28 May 1997 whereby the two countries established two independent national fleets, divided armaments and bases between them, and set forth conditions for basing of the Russian Black Sea Fleet in Crimea. The treaty was supplemented by provisions in the Russian–Ukrainian Friendship Treaty, which was signed three days later. Russia unilaterally terminated the Partition Treaty in 2014 after it annexed Crimea.