During the 1930s, the ACLU started to engage in work combating police misconduct and Native American rights.

During the 1930s and 1940s Joseph Stalin's NKVD carried out numerous assassinations outside of the Soviet Union, such as the killings of Organization of Ukrainian Nationalists leader Yevhen Konovalets, Ignace Poretsky, Fourth International secretary Rudolf Klement, Leon Trotsky, and the Workers ' Party of Marxist Unification ( POUM ) leadership in Catalonia.

During the 1930s other ideas were proposed as non-standard cosmologies to explain Hubble's observations, including the Milne model, the oscillatory Universe ( originally suggested by Friedmann, but advocated by Albert Einstein and Richard Tolman ) and Fritz Zwicky's tired light hypothesis.

During the 1930s, the silent film comedy was replaced by dialogue from film comedians such as the W. C. Fields and the Marx Brothers.

During the 1930s, multiple acts of cannibalism were reported from Ukraine and Russia's Volga, South Siberian and Kuban regions during the Soviet famine of 1932 – 1933.

During the 1930s, the original art for a daily strip could be drawn as large as 25 inches wide by six inches high.

During the 1930s, the original art for a Sunday strip was usually drawn quite large.

During the 1930s and 40s, significant improvements were made to the ground, making it one of the largest in the country at that time.

During the 1930s the French Army experimented with integrating mounted and mechanised cavalry units into larger formations.

During the 1930s and early 1940s, Alston created illustrations for magazines such as Fortune, Mademoiselle, The New Yorker, Melody Maker and others.

During the early 1930s throughout Europe, Jewish owners of numerous fine art masterpieces found themselves forced to give up or sell off their collections for minimal prices due to anti-Jewish laws created by the new Nazi regime.

During the late 1920s and early 1930s Eisenhower's career in the post war army stalled somewhat, as military priorities diminished ; many of his friends resigned for high-paying business jobs.

During the 1920s and 1930s destroyers were often deployed to areas of diplomatic tension or humanitarian disaster.

During the Great Depression of the 1930s, John Maynard Keynes authored a book entitled The General Theory of Employment, Interest and Money outlining the key theories of Keynesian economics.

During the 1920s and 1930s, Aimee Semple McPherson was a controversial faith healer of growing popularity during the Great Depression.

During the latter's dictatorship in the 1930s, Guatemala was further opened up to foreign investment, with special favors being made by Ubico to the United Fruit Company in particular.

During the late 1930s and through the 1940s — the heyday of big band jazz and swing music — the guitar was an important rhythm section instrument.

During the early 1930s, the Vienna Circle dispersed, mainly because of political upheaval and the deaths of Hahn and Schlick.

During the 1920s and the 1930s, Stalin fought and defeated the political influence of Leon Trotsky and of the Trotskyists in Russia, by means of slander, anti-Semitism, programmed censorship, expulsions, exile ( internal and external ), and imprisonment.

Hofmann was renowned not only as an artist but also as a teacher of art, and a modernist theorist both in his native Germany and later in the U. S. During the 1930s in New York and California he introduced modernism and modernist theories to a new generation of American artists.

During the 1930s, the illustrator Vernon Grant developed Snap, Crackle and Pop as gnome-like mascots for the Kellogg Company.

During the 1930s and 1940s, the state passed labor laws, implemented agrarian reform, and assumed a role in modernization, influenced in part by the leadership of Juan Domingo Perón in Argentina and Getúlio Dornelles Vargas in Brazil.

During the 1930s, the minotaur replaced the harlequin as a common motif in his work.

During the 1930s and 1940s, Heinlein was deeply interested in Alfred Korzybski's General Semantics and attended a number of seminars on the subject.

During the 1892 – 1894 war between the Congo Free State and the Swahili-Arab city-states of Nyangwe and Kasongo in Eastern Congo, there were reports of widespread cannibalization of the bodies of defeated Arab combatants by the Batetela allies of Belgian commander Francis Dhanis.

During its history the area has also been known as Congo, Congo Free State, Belgian Congo and Zaire.

During this early period of the French rule, the Belgian economy was completely paralyzed: it was forbidden to export from the port of Antwerp, heavy taxes had to be paid in gold and silver coin, while goods bought by the French were paid for with worthless assignats.

During the war, the largest known reserves of uranium were in the Katanga ( a province of the Belgian Congo ).

During the Kosovo crisis of 1999, 600 Belgian paratroopers participated in Operation Allied Harbour, a NATO operation to protect and provide assistance to the huge number of ethnic Albanian refugees in Albania and Macedonia.

During this period, one of his high-profile film roles was as Agatha Christie's Belgian master detective Hercule Poirot in the 1974 film Murder On The Orient Express.

During Baudouin's reign the colony of Belgian Congo became independent.

During this session, the Belgian Mission at the UN asked for a vote on ILGA's application, because " The organization had applied for over ten years and met all prerequisites under the resolution.

During this era it was part of the Belgian departement of the Nedermaas.

During World War I ( in which the Netherlands stayed neutral ) North Brabant was inundated by Belgian refugees.

During World War I, Veurne was located within the Yser pocket of Belgian resistance against the German troops.

During the Battle of the Yser, the Veurne city hall became the headquarters for the Belgian troops under King Albert I and a military hospital was set up in the city.

During the Nazi German occupation in the Second World War, Wezembeek was the home of an orphanage set up by the Association of Belgian Jews ( AJB ), a Judenrat-like authority forcibly organised by the German occupational force and collaboratiing with the Nazis.

During World War I Camp Fire Girls helped to sell over one million dollars in Liberty Bonds and over $ 900, 000 in Thrift Stamps ; 55, 000 girls helped to support French and Belgian orphans, and an estimated 68, 000 girls earned honors by conservation of food.

During World War I, Spaak attempted to join the Belgian Army, but was captured by the Germans, and spent the next two years in a German prison camp.

During the same period, Spaak was also a tennis star, and played for the Belgian team in the 1922 Davis Cup.

During this time he twice was appointed Prime Minister as well, first from 13 to 31 March 1946 – the shortest government in Belgian history, and again from March 1947 to August 1949.

During the war the airline managed to maintain its Belgian Congo routes, but all European services ceased.

During the so called " Hotel agreement ", signed on July 17, 2001, Belgian prime minister Guy Verhofstadt met with Swissair boss Mario Corti, who agreed to inject € 258 million into SABENA.

During these years he also had to handle the School War and the independence of the Belgian Congo.

During this period, the Belgian royal family lived in exile in Prégny, Switzerland ; King Leopold's younger brother, Prince Charles of Belgium, was made Regent of the country.

During the 1960s Belgian coal mines faced an enormous shortage of employees.

During a Belgian season the location of the group was small on screen during the introduction of the host.

During the East African Campaign of World War I, the north-west part of German East Africa, Ruanda-Urundi, was invaded by Belgian and Congolese troops in 1916 and was still occupied by them at the end of the war in 1918.