The June Uprising (Lithuanian: Birželio sukilimas) was a brief period in late June 1941 between the first Soviet and the Nazi occupations.
A year earlier, on June 15, 1940, the Red Army occupied Lithuania and established the unpopular Lithuanian Soviet Socialist Republic, which silenced its critics and suppressed resistance with political repression and state terrorism. When Nazi Germany attacked the Soviet Union on June 22, 1941, the Lithuanian Activist Front initiated the June uprising for which it had been preparing since late 1940 and formed the short-lived provisional government. The Lithuanian insurgents liberated Kaunas and Vilnius before the Wehrmacht arrived and within a week, all of the Lithuanian territory was free from the occupying Red Army.
The June uprising was directed militarily against the Soviets but politically against the Germans, who were against the declaration of Lithuanian independence, and the establishment of the Provisional Government of Lithuania and various Lithuanian self-rule institutions. The German Army was greeted by anti-communist Lithuanians as liberators from repressive Soviet rule, because of the widespread hopes that Germany would help to recreate Lithuanian independence. For many Lithuanians, even a somewhat autonomous status, akin to the Slovak Republic, was appealing compared to the Soviet occupation. This was not granted by the German occupiers, who steadily replaced Lithuanian institutions with their own and established the Reichskommissariat Ostland on July 17, 1941. Deprived of any real power, the provisional government disbanded itself on August 5. Lithuanians were quickly disillusioned with German obstruction to their independence and their subsequent anti-Nazi resistance was passive, in order to not aid Soviet victory and save up Lithuanian military power to resist a future Soviet re-occupation.
In 1918, Lithuania achieved independence in the aftermath of World War I and the Russian Revolution and secured its statehood during the Lithuanian Wars of Independence. Initially, prior to World War II, Lithuania declared neutrality, and its Seimas passed the neutrality laws.
In June 1940, the Lithuanian government submitted to the Soviet ultimatum and Lithuania was occupied, transformed into the Lithuanian SSR, and incorporated into the Soviet Union. The Soviets began implementing various Sovietization policies, including nationalization of private property, and mass arrests of political activists and others dubbed "enemies of the people". These arrests targeted many prominent politicians such as Aleksandras Stulginskis, Juozas Urbšys, Leonas Bistras, Antanas Merkys, Pranas Dovydaitis, Petras Klimas, government officials, military officers, and members of the Lithuanian Riflemen's Union. The Lithuanian Army was reorganized as the 29th Rifle Corps of the Red Army. The Soviets also closed all non-communist cultural, religious, and political organizations. The economic situation steadily worsened and the standard of living decreased.
A year later, just a week before the uprising, some 17,000 Lithuanians, mainly the intelligentsia, were taken with their entire families and deported to Siberia, where many died of the inhumane living conditions. It was the single most important precipitating event that incited popular support for the uprising and a positive predisposition toward the German invasion. Those who escaped the deportations or arrests spontaneously organized themselves into armed groups hidden in the forests and waited for the wider uprising.
The ultimate goal of the Lithuanian Activist Front (LAF), formed in the fall of 1940, was to re-establish Lithuanian independence. Started by Kazys Škirpa in Berlin, the LAF sought to unify the Lithuanian resistance, and organize and conserve resources for the planned uprising against the Soviets. It acted as an umbrella organization and many groups used the LAF name even though they were not connected with the LAF in Berlin. The LAF established its military–political headquarters in Vilnius and organizational headquarters in Kaunas. The communication and coordination between the centers in Berlin, Kaunas, and Vilnius were rather poor. The headquarters in Vilnius suffered heavily from Soviet arrests, especially in early June 1941, and became largely defunct. Most of those arrested activists were executed in December 1941 in the Soviet Union.
In March 1941, the LAF in Berlin published a memorandum, titled Brangūs vergaujantieji broliai (English: Dear Enslaved Brothers), with instructions on how to prepare for the war between Nazi Germany and the Soviet Union. Insurgents were asked to secure strategic objects like prisons, railroads, bridges, communication hubs, and factories, guarding them against potential sabotage by the retreating Red Army, while Central Headquarters was to organize a provisional government and declare independence. In April, a list of the members of the provisional government was compiled. The prime minister's post was reserved for Škirpa, four ministers were from Vilnius, six from Kaunas, and one from Berlin. The members represented a wide spectrum of pre-war political parties and, as such, claimed to represent a majority of the Lithuanian people. Some have suggested that not all of the designated ministers knew about their proposed appointment to the provisional government. On June 14, the Nazi authorities in Berlin insisted that Škirpa and his activists not form any government or make any public declarations without their prior approval. Škirpa agreed to this, but had very little control over the activists in Lithuania itself.
German advances and Soviet retreat
At 3:15 am on June 22, the territory of the Lithuanian SSR was invaded by two advancing German army groups: Army Group North, which took over western and northern Lithuania, and Army Group Centre, which took over most of the Vilnius Region. The Germans amassed some 40 divisions, 700,000 troops, 1,500 tanks, and 1,200 airplanes for the attack on the Lithuanian SSR. The Soviets had about 25 divisions, 400,000 troops, 1,500 tanks, and 1,344 airplanes in the Baltic Military District. 7 rifle and 6 motorized divisions from the 8th and 11th armies were located within Lithuanian territory.
The first attacks were carried out by the Luftwaffe against airports, airfields, and Lithuanian cities (Kėdainiai, Raseiniai, Karmėlava, Panevėžys, Jurbarkas, Ukmergė, Šiauliai, and others). These attacks killed some 4,000 civilians. Most of the Soviet Air Forces' aircraft were obliterated on the ground (322 airplanes were lost in the air versus 1,489 destroyed on ground). The Germans rapidly advanced, encountering only sporadic resistance from the Soviets near Kaltinėnai, Raseiniai, and Šiauliai, and assistance from the Lithuanians. In the Battle of Raseiniai, the Soviets attempted a counterattack, reinforced by tanks, but suffered heavy losses. Within a week, the Germans had sustained 3,362 casualties but controlled all of Lithuania. Soviet losses were heavy and not known precisely; estimates put them at 12–15 divisions. The Red Army also lost most of the aircraft stationed there, tanks, artillery, and other equipment.
Despite the generally friendly Lithuanian attitude, the Germans carried out punitive executions. For example, 42 civilians from Ablinga village were killed in response to German deaths: After two German guards in Alytus were shot by unknown perpetrators, the Nazis shot 42 Lithuanian insurgents. The terror in Alytus continued the next day; the Germans selected men, age 15–50, and executed them in groups of 20–25.
More atrocities were carried out by the retreating Red Army. About 4,000 political and criminal prisoners arrested during the first Soviet occupation were transported to the Soviet Union. The NKVD organized prisoner massacres in Rainiai, Pravieniškės, and Panevėžys. Forty mass killing sites have been identified in Lithuania. Many others were killed en route to Soviet prisons. The largest such massacre took place near Chervyen in present-day Belarus. A list of NKVD victims in Lithuania, compiled during the Nazi occupation, includes 769 people that did not participate in the uprising.