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, 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 Belgian colonial authorities in Rwanda used phrenology to explain the so-called superiority of Tutsis over Hutus.

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 late 1927, Warners released The Jazz Singer, which was mostly silent but contained what is generally regarded as the first synchronized dialogue ( and singing ) in a feature film ; but this process was actually accomplished first by Charles Taze Russell in 1914 with the lengthy film The Photo-Drama of Creation.

During Reconstruction, Davis remained silent ; however, he privately expressed opinions that federal military rule and Republican authority over former Confederate states was unjustified.

During this phase, the outer circle remains silent.

During the silent period, Garbo developed an acting technique that is thought to have been ahead of its time, one that set her apart from other actors and actresses of the period.

During the age of silent movies, monsters tended to be human-sized, e. g., Frankenstein's monster, the Golem, werewolves and vampires.

During his long career in the movies, his roles ran the gamut from early silent villains to secondary parts in which his mild Danish accent and pleasant voice suited him to depict a succession of benevolent fathers, doctors, professors and European noblemen.

During the Florida land boom of the 1920s, New Port Richey became the winter home of silent screen star Thomas Meighan and golfer Gene Sarazen ; Meighan attempted to bring other Hollywood figures to the city.

During the silent film era, filmmakers were not able to use synchronized dialogue until sound became possible in the late 1920s.

During the era of silent films these were accompanied by the Paxtonville Orchestra.

During World War I he served in the Merchant Marine, after which he found employment singing as prologue to silent movies at the Grauman " Million Dollar " Theater in downtown Los Angeles.

During the run of the exhibition, Abramović performed " The Artist is Present ," a 736-hour and 30-minute static, silent piece, in which she sat immobile in the museum's atrium, while spectators were invited to take turns sitting opposite her.

During the German occupation of Denmark in World War II, Ingrid, with her personal courage and integrity, influenced the Danish Royal House and its conduct in relation to the occupation forces, and won great popularity as a symbol of silent resistance and public patriotic moral.

During cinema's formative years, silent screen actors were not named, because studio owners feared that fame might lead to demands for higher wages.

During the confusion which followed Cromwell's death on 3 September 1658, Monck remained silent and watchful at Edinburgh, careful only to secure his hold on his troops.

During the day it lies silent upon the ground, often on a heap of stones, concealed by its plumage ; it is difficult to detect, looking like a bit of lichen-covered twig or a fragment of bark.

During the silent era, aspect ratios varied widely, from square 1: 1, all the way up to the extreme widescreen 4: 1 Polyvision.

During these times of depression, when she was unable to move ahead with her own writing, Lane would easily find work as a ghostwriter or " silent " editor for other well-known writers.

During this time, most Israelis stand at attention, and most of the country comes to a standstill as people pay silent tribute to the dead.

During the day this nightjar lies silent upon the ground, concealed by its plumage ; it is difficult to detect, looking like a bit of lichen-covered twig or a fragment of bark.

During the day this nightjar lies silent upon the ground, concealed by its plumage ; it is difficult to detect, blending in with the sandy soil.

During the electoral period the attitude of all parties had been to keep silent on the " affaire " and to exaggerate their enthusiasm for the army ; later on, a few provincial councils called for strong measures against the agitators.

During the 1920s she appeared as a co-lead in various Hollywood silent movies, including some with Rudolph Valentino.

During the silent film age the written language was Chinese and was known to all, no matter the language spoken ( Kei, 1994 ).

During the 1920s, she acted on stage and appeared in silent films.