Belgian coal recruitment
Germany to Belgium·1947–1951
From 1947 the Belgian collieries recruited displaced persons out of the International Refugee Organisation camps in occupied Germany on two-year underground contracts, an operation known in Belgium as the kolenslag. Some 21,906 eastern European refugees entered the Belgian mines, and the Ukrainian population of Belgium rose to about 10,000 by 1947.
Introduction
Belgium came out of the war with its industry comparatively intact and with an export market its competitors could not serve. Coal and steel remained the backbone of the economy, and the coal drive that followed, the kolenslag, ran from 1947 to 1951. It could not be manned from the Belgian labour force. Fifty thousand German prisoners of war had provided a temporary answer, and from 1946 the collieries, working with the Belgian authorities, looked to the Italian labour reserve and to the eastern Europeans in the refugee camps of occupied Germany.14
Belgium was among the first countries to declare itself willing to take those refugees. The scheme that followed brought 21,906 eastern European refugees into the Belgian mines. It is distinct from the wartime forced labour that had already brought Ukrainians to the same pits: the camps at Waterschei, Zwartberg and Eisden had held Ostarbeiter and Soviet prisoners between 1942 and 1944, and the same huts were reused after 1947 to house the new contract workers.14
A history in dates
- 1945About 2,000 Ukrainian refugees, mostly former forced labourers, arrive in Belgium; the Ukrainian Relief Committee is formed in Brussels.2
- 1945A first post-war group of Polish displaced persons arrives in Belgium.6
- 1946The Belgian mining industry and the authorities look to Italy and to the eastern Europeans in the German refugee camps for labour.1
- 1947
- Spring 1947A second group of Poles comes over from the refugee camps in Germany; an estimated thousand are employed in the Liege mines.6
- 19473,917 displaced persons are employed in the Liege basin, most of them in the coal mines.6
- 1947The number of Ukrainians in Belgium rises to about 10,000.2
- 1947 to 1949Several thousand Ukrainians take mining work in Belgium; Redemptorist priests begin pastoral work in the coalfield.3
- About 1949 to 1950Ukrainian congregations form at Waterschei, Winterslag and Zwartberg.3
- 1951
- End of 1944 to end of 1952The number of miners of non-Belgian nationality at Liege becomes six times larger as the number of Belgians in the Liege mining industry falls by more than 3,000.6
- 1955About 5,000 Ukrainians remain in Belgium.2
- 1958257 families and 971 single men are still living in converted barracks at Genk, Lanklaar and Houthalen.4
- 1977About 4,000 Ukrainians remain in Belgium.2
Origins and purpose
The recruitment served two aims that pulled against each other. For the Belgian mining industry it was a labour operation, and the men were wanted underground. For the International Refugee Organisation, which managed the camps and the selection, it was resettlement, and the Belgian authorities promised the refugees a free and normal life in Belgium. The historians of the scheme identify that tension as the source of the trouble that followed, both during recruitment and afterwards.1
The IRO's position was general rather than particular to Belgium. Selection teams sent by destination countries were recruiting labour to their own governments' economic requirements, and resettlement outside the United States and Israel was organised almost entirely according to those requirements.5
How it worked in practice
Recruitment took place inside the refugee camps in occupied Germany, which the IRO administered from July 1947. Candidates who accepted signed a two-year contract for work in the Belgian mines. Selection favoured men fit for underground work; the Belgian and IRO records of the operation are held in the Brussels state archives, the Hasselt state archive holdings of the coal employers' federation Fedechar, the UNHCR office in Brussels and the IRO series AJ 43 in the French national archives.21
Housing was the immediate constraint on arrival. The collieries put up new lodging houses for single men in the garden suburbs and built new estates with the national cheap housing company, and where that was not fast enough they used prefabricated temporary settlements. They also reused what the occupation had left: from 1947 the prisoner of war barracks camps built by the Germans housed the immigrants and their families, 225 huts of timber and asphalt paper, to be demolished as other accommodation became available. They lasted much longer than intended. In 1958 there were still 257 families and 971 single men living in converted barracks at Genk, Lanklaar and Houthalen.4
The Ukrainians who came under the scheme reached the Limburg pits and the Walloon coalfield alike, and the site pages for Waterschei, Zwartberg and the Russisch Kamp at Eisden record the reuse of those particular camps for contract workers from 1947. Belgian settlement concentrated in the coal region: the provinces of Hainaut, Limburg and Liege.42
A comparative study of the Liege and Limburg coalfields gives local figures for the Walloon side of the recruitment. A first post-war group of Polish displaced persons had arrived in Belgium in 1945; a second group came over from the refugee camps in Germany in the spring of 1947, and an estimated thousand of them were employed in the Liege mines. In total 3,917 displaced persons were employed in the Liege basin during 1947, most of them in the coal mines. Almost half of the displaced persons who arrived in Belgium in 1947 and 1948 held Polish nationality and the other half comprised twenty other, mainly East European, nationalities, which the study does not list separately. Between the end of 1944 and the end of 1952 the number of miners of non-Belgian nationality at Liege became six times larger, while the number of Belgians in the Liege mining industry fell by more than 3,000.6
Reuse of the wartime barracks for contract workers
| Measure | Figure | Source scope |
|---|---|---|
| Prisoner of war barracks turned over to immigrant housing from 1947 | 225 huts of timber and asphalt paper | Across the Limburg coalfield, all nationalities |
| Families still in converted barracks, 1958 | 257 | Genk, Lanklaar and Houthalen together, all nationalities |
| Single men still in converted barracks, 1958 | 971 | Genk, Lanklaar and Houthalen together, all nationalities |
Sources for this section
- Belgium
- Hoe de Belgische mijnindustrie een nieuw thuis aan vluchtelingen-mijnwerkers aanbood (1947-1951)
- Van ontdekking tot sluiting: wie waren de mijnwerkers?
- Regional labour markets and international labour migration in twentieth-century Europe: the cases of coal mining in Liège (B) and Limburg (NL) compared
The Ukrainian experience within the scheme
Ukrainians were already present in small numbers before the scheme. About 2,000 refugees, mostly women who had been forced labourers in Germany, had arrived from 1945, and the Ukrainian Relief Committee in Belgium was formed in Brussels that year. The recruitment changed the scale. By 1947 the number of Ukrainians in Belgium had risen to about 10,000 as refugees from the displaced persons camps in Germany accepted work under the two-year contracts. That is a Ukrainian figure for the country as a whole, not a count of Ukrainian miners, and it is not a subtotal of the 21,906 recorded for the mines.21
The Ukrainian Greek Catholic account of the Limburg parishes describes the same movement from the inside. Several thousand Ukrainians came to Belgium for shorter or longer periods between 1947 and 1949 for work offered in the coal mines under the kolenslag, and several thousand of those went to the Limburg pits. Redemptorist priests were the first to provide pastoral care, and small associations rather than formal parishes formed around the collieries at Waterschei, Winterslag and Zwartberg in about 1949 and 1950. From 1950 to 1963 a single priest served Genk and Zolder, given a miner's house and a subsidy by the director of the Andre Dumont mine and travelling between the communities at first by bicycle.3
Community organisation was rapid and wide. The Ukrainian Relief Committee ran 29 branches between 1946 and 1949; the Ukrainian Youth Association had 21 chapters by 1949; the Ukrainian Student Home was established at Leuven with the help of the Apostolic See and Archbishop Ivan Buchko, and a Ukrainian Learned Educational Society was formed in 1947. Under Buchko the pastoral work was organised as a deanery with centres at Brussels, Wasmes, La Louviere, Liege, Leuven and Genk. The Limburg miners maintained their own cultural house, where children were taught reading and writing, catechism, Ukrainian geography and history and church music.23
Ukrainians in Belgium
| Date | Number | Source scope |
|---|---|---|
| From 1945 | about 2,000 | Mostly women who had been forced labourers in Germany |
| 1947 | about 10,000 | Ukrainians in Belgium as a whole, after arrivals on two-year contracts from the German camps |
| 1948–1949 | over 200 | Members of the Ukrainian intelligentsia in Belgium |
| 1955 | about 5,000 | Ukrainians in Belgium as a whole |
| 1977 | about 4,000 | Ukrainians in Belgium as a whole |
What happened afterwards
The resettlement half of the bargain did not hold. Dissatisfaction with conditions in Belgium was marked enough to be noted in the IRO's own practice: refugees who returned from Belgium to the western zones of Germany were treated by the organisation as not yet resettled and therefore still eligible for other schemes. The historians of the Belgian operation conclude that in the end the majority of the refugees decided it looked more promising to start a new life elsewhere.51
The Ukrainian numbers show the same movement. On completing their contracts some returned to Germany and some went on to the United States and Canada. The Ukrainian population of Belgium fell from about 10,000 in 1947 to about 5,000 in 1955 and about 4,000 by 1977. The parish account records the same drift: as people left for distant countries the number of Ukrainians declined steadily and the parish centres were reduced to three, at Waterschei-Genk, Zolder and Eisden.23
By comparison with the countries of mass overseas resettlement, Belgium's share was small. The IRO's final statistical report records 10,378 Poles resettled in Belgium out of 357,635 Polish nationals resettled in all, against 35,780 to Great Britain and 60,308 to Australia. The Belgian intake was heavily concentrated in one industry, and its Ukrainian component was largely a transit population.52
Sources
- Hoe de Belgische mijnindustrie een nieuw thuis aan vluchtelingen-mijnwerkers aanbood (1947-1951)
Frank Caestecker and Lieselotte Luyckx, Revue belge de philologie et d'histoire 97/4, pp. 1299–1326 · 2019
The three abstracts, French, English and Dutch, and the open first page, p. 1299, were read: the total of 21,906 eastern European refugees entering the Belgian mines, recruitment in the IRO camps in occupied Germany, the promise of a free and normal life, the tension between labour recruitment and resettlement, the majority's eventual departure, the fifty thousand German prisoners as a temporary answer, the 1946 turn to Italy and the German camps, and the article's archival abbreviations. Pages 1300 to 1326 are behind the Persée preview and were not read.
- Belgium
Internet Encyclopedia of Ukraine, Canadian Institute of Ukrainian Studies · Accessed 13 September 2026
Full entry read: the roughly 2,000 arrivals from 1945, the rise to 10,000 Ukrainians by 1947 under two-year contracts from the German camps, returns to Germany and departures for the United States and Canada, the fall to about 5,000 in 1955 and about 4,000 in 1977, concentration in Hainaut, Limburg and Liege, and the organisational life including the Relief Committee's 29 branches and SUM's 21 chapters.
- Oekraïense parochies OGKK in Limburg 1947–2016
Dr J. Koziej, Heilige Sophia vzw, Waterschei-Genk · 29 November 2016
Full article read: several thousand Ukrainians migrating to Belgium in 1947–1949 for mine work under the kolenslag, several thousand of them to the Limburg pits, Redemptorist pastoral care, the first congregations at Waterschei, Winterslag and Zwartberg about 1949–1950, the priest serving Genk and Zolder from 1950 to 1963 with a miner's house and a subsidy from the André Dumont mine, the deanery structure under Archbishop Buchko, the cultural house and its lessons, and the reduction of parish centres to three as people emigrated.
- Van ontdekking tot sluiting: wie waren de mijnwerkers?
Ons mijnverleden, Cosimo · Accessed 13 September 2026
Section on housing during the kolenslag read in full: the 1947 to 1951 dating of the coal drive, the housing crisis, new lodging houses and estates, prefabricated temporary settlements, the reuse from 1947 of the German-built prisoner of war barracks for immigrants and their families, the figure of 225 timber and asphalt paper huts, and the 1958 figures of 257 families and 971 single men still in converted barracks at Genk, Lanklaar and Houthalen.
- The International Refugee Organisation's Resettlement Policy
Paweł Sękowski, RCIN digital repository · Accessed 13 September 2026
All fifteen pages read: the observation that dissatisfaction with resettlement conditions in Europe, especially in Belgium, sent many refugees back to the western zones of Germany and that the IRO then treated them as not yet resettled; the statement that destination countries' selection teams recruited to economic policy; and Table 2, drawn from the IRO Final Statistical Report in Archives nationales AJ 43/1257, giving 10,378 Poles resettled in Belgium, 11,882 in France and 35,780 in Great Britain.
- Regional labour markets and international labour migration in twentieth-century Europe: the cases of coal mining in Liège (B) and Limburg (NL) compared
Serge Langeweg, Leen Roels and Ad Knotter, Mitteilungsblatt des Instituts für soziale Bewegungen, Heft 40, pp. 101–120 · 2008
Pages 115 and 116 read: the arrival of a first post-war group of Polish displaced persons in 1945 and a second group from the refugee camps in Germany in the spring of 1947 with an estimated thousand employed in the Liège mines, the figure of 3,917 displaced persons employed in the Liège basin during 1947 at footnote 72, the split between Polish nationality and twenty other mainly East European nationalities among 1947 and 1948 arrivals, and the sixfold rise in non-Belgian miners at Liège between the end of 1944 and the end of 1952 against a fall of more than 3,000 Belgians.
Last researched 13 September 2026