The Construction Corps () in Bulgaria was a military construction organisation subordinated to the Ministry of Defence or directly to the government, which existed from 1920 to 2000.
The organisation started as national compulsory labour service (trudova povinnost) in 1920 which drafted all able-bodied Bulgarians in place of national military service. It was militarised and incorporated into the armed forces as the Labour Corps (Trudovi Voiski) during the period 1935–1946. During the Communist era it was re-organised a number of times, taking its final form and name in 1969.
History
National compulsory labour service 1920–1935
In the last months of World War I, the Ministry of War announced the idea of a conscription-based national labour service. For this purpose a commission was appointed consisting of: Chairman Major General Konstantin Kirkov; members: Colonel Ivan Bozhkov, Lieutenant Colonel Kosta Nikolov, Lieutenant Colonel Dimitar Nachev, Lieutenant General Stilian Kovachev, Lieutenant Colonel Todor Georgiev, Hristo Chakalov – Manager of the BNB, two agronomists and a representative of the Bulgarian Agricultural Bank. The original law drafted by the commission was not approved by the Council of Ministers but the draft did become the basis for all subsequent legislation on the subject.
Defeat in World War 1 brought to power in October 1919 the radical anti-war Agrarian party leader Aleksandar Stamboliyski. Faced with the ruinous consequences of the war Stamboliyski adopted compulsory labour service as one of two key reforms aimed at rebuilding the country (the other being land reform). The Bill provoked vehement opposition on the ground that it revived the Ottoman feudal labour obligation and exploited young people, but Stamboliyski's overwhelming election victory in 1920 meant it was voted into law on 23 May 1920.
Stamboliyski's official reasons were to enable post-war reconstruction at a time when the impoverished country was faced with enormous war reparations; and to provide modern vocational education for young men and women. However, an underlying reason was to circumvent the limitations of the Treaty of Neuilly-sur-Seine on the size of the Bulgarian Armed Forces, which limited the army to 20,000. The new labour service de facto maintained the organisational structure of the former national military service, prompting protests from the neighbouring Yugoslavia and Greece that all the Bulgarians had to do was replace the spades with rifles and they'd have a trained army. The Inter-Allied Commission required the bill to be suspended until changes were agreed.
Compulsory labour service came into force on 14 June 1920 with the establishment of the Main Directorate "Compulsory Labour Service" within the Ministry of Public Works. All able-bodied Bulgarians, except those exempted for legitimate reasons (for example muslim females were exempted) and those who had served the state for more than three consecutive months, were required to serve either in the Regular service (eight months maximum for men between 20 and 40 years, four months for women between 16 and 30 years) or in the Temporary service up to 21 days a year. Exemptions could also be purchased at a set daily rate.
Labour service proved very effective in carrying out post-war reconstruction. The vast majority of the work was road and railway construction, although there were also manufacturing, agriculture and reforestation projects. An International Labour Report calculated that just in the Regular service from 1921 to 1936 a total of 313,669 "trudovaks" (labourers) were recorded as completing their compulsory service; that the work done for the State entailed 22,591,068 eight-hour days and reached a value of 1,680,088,675 leva; and that the annual balance-sheets showed aggregate receipts of 3,330,466,451 leva and expenditure of 2,449,101,898 leva, or a profit of 881,364,553 leva. The Bulgarian example was widely studied and copied abroad, for instance by Germany in the formation of the Reich Labour Service.