The government of the Kingdom of Bulgaria under Prime Minister Georgi Kyoseivanov declared a position of neutrality upon the outbreak of World War II.
[4] However, it was clear that the central geopolitical position of Bulgaria in the Balkans would inevitably lead to strong external pressure by both World War II factions.
Bulgaria, as a potential beneficiary from the Molotov–Ribbentrop Pact in August 1939, had competed with other such nations to curry favour with Nazi Germany by gestures of antisemitic legislation.
His protégé, government lawyer and fellow Ratnik, Alexander Belev, had been sent to study the 1935 Nuremberg Laws in Germany and was closely involved in its drafting.
In late 1938 and early 1939 Bulgarian police officials and the Interior Ministry were already increasingly opposed to the admittance of Jewish refugees from persecution in Central Europe.
[6][13][5] On 1 April 1941 the Police Directorate allowed the departure of 302 Jewish refugees, mostly underage, from Central Europe for the express purpose of Bulgaria "freeing itself from the foreign element".
The threat of a possible German invasion, as well as the promise of Greek and Yugoslavian territories, led the Tsar and his government to sign the Tripartite Pact on 1 March 1941.
Bulgaria's contribution to Operation Marita and the Axis conquest of Greece was relatively minor; the Bulgarians and a Wehrmacht division guarded the left flank of the invasion.
[4] In words chosen by Tsar Boris, Bulgaria announced the occupation of Macedonia and Thrace "to preserve order and stability in the territories taken over by Germany".
Included in the area occupied were the cities of Alexandroupoli (Bulgarian: Дедеагач, romanized: Dedeagach), Komotini (Гюмюрджина, Gyumyurdzhina), Serres (Сяр, Syar), Xanthi (Ксанти), Drama (Драма) and Kavala (Кавала) and the islands of Thasos and Samothrace in Greece, as well as almost all of what is today the Republic of North Macedonia and much of souterneastern Serbia, then in Yugoslavia.
[5] A decree-law issued on 10 June 1942 (Nerada za podantstvo v osvobodenite prez 1941 godina zemi) confirmed that the "liberated" territories' Jewish residents were ineligible for Bulgarian citizenship.
[33] This released the 7th SS Volunteer Mountain Division Prinz Eugen, which had been garrisoning this area over the winter, to deploy into the NDH and take part in Case White against the Partisans.
From this point, German forces only directly occupied the immediate area of Belgrade, the northwest region of the territory that shared a border with the NDH, and the Banat.
Although essentially symbolic gestures, these trips by senior officers provided a channel for intelligence but most importantly demonstrated Bulgaria's "investment" in Hitler and the Axis.
[39] When Germany invaded the USSR in June 1941 (Operation Barbarossa), the underground Bulgarian Communist Party launched a guerrilla movement, which was repressed severely by the government.
[4] A motive for an assassination is difficult to establish: it would have been a great risk for Germans, Soviets, and British; it was uncertain who might replace Boris at the centre of the Bulgarian state.
On 23 August, Romania left the Axis Powers and declared war on Germany, which and allowed Soviet forces to cross its territory to reach Bulgaria.
[45] On 5 September, Muraviev decided to break off diplomatic relations with Germany, but delayed announcing the move for two days at the urging of War Minister Lieut.
[50] The Bulgarian irredentist seizure in 1941 of coveted territory from Greece and Yugoslavia and the formation of the new oblasts of Skopje, Bitola, and Belomora increased Bulgaria's Jewish population to around 60,000.
[5] From early in the war, Bulgarian occupation authorities in Greece and Yugoslavia handed over Jewish refugees fleeing from Axis Europe to the Gestapo.
In October 1941 Bulgarian authorities demanded the registration of 213 Serbian Jews detected by the Gestapo in Bulgarian-administered Skopje; they were arrested on 24 November and 47 of these were taken to Banjica concentration camp in Belgrade, Serbia and killed on 3 December 1941.
[52][5][53] The Law for the Protection of the Nation was followed by a decree-law (naredbi) on 26 August 1942, which tightened restrictions on Jews, widened the definition of Jewishness, and increased the burdens of proof required to prove non-Jewish status and exemptions (privilegii).
Jewish units were separated from the other ethnicities - three quarters of the forced labour battalions were from minorities: Turks, Russians, and residents of the territories occupied by Bulgaria - the rest were drawn from the Bulgarian unemployed.
[58][5] The Jews in forced labour were faced with discriminatory policies which became stricter as time went on; with increasing length of service and decreasing the allowance of food, rest, and days off.
[5] On 14 July 1942 a disciplinary unit was established to impose new punitive strictures: deprivation of mattresses or hot food, a "bread-and-water diet", and the barring of visitors for months at time.
A maximum of 30 kg of property per person was allowed;[65] the rest they were forced leave behind, to sell at "abusively low" prices, or which was otherwise pilfered or stolen.
[69] In Macedonia, the Bulgarian troops, surrounded by German forces, and betrayed by high-ranking military commanders, fought their way back to the old borders of Bulgaria.
Southern and eastern Serbia and Macedonia were liberated within a month and the 130,000-strong Bulgarian First Army continued to Hungary, driving off the Germans and entering Austria in April 1945.
As a consequence of World War II, the Soviet Union invaded Bulgaria and a Communist regime was installed in 1946 with Georgi Dimitrov at the helm.
The occupied parts of the Aegean region and Vardar Macedonia remaining within the borders of Bulgaria were returned, with 150,000 Bulgarians being expelled from Western Thrace.