During the 1950s there were as many as 25,000 schools in the Congo.

During the early 1950s the board was divided on whether to defend communists persecuted under McCarthyism.

During the late 1950s it was sought by two rail historians, George Horn and Martin Schachne, but they did not gain access to the tunnel itself.

During the 1950s, the National Football League had grown to rival Major League Baseball as one of the most popular professional sports leagues in the United States.

During the 1950s, however, Graham began distancing himself from the older fundamentalism and, in preparation for his 1957 New York Crusade, he sought broad ecumenical sponsorship.

During his early journalism career, Marker became increasingly interested in filmmaking and experimented with photography in the early 1950s.

During the 1940s and 1950s, Casablanca was a major centre of anti-French rioting.

During the late 1950s and early 1960s Brubeck canceled several concerts because the club owners or hall managers continued to resist the idea of an integrated band on their stages.

During the 1950s, Kaye visited Australia, where he played " Buttons " in a production of Cinderella in Sydney.

During World War II and through the 1950s, high frequency (" short wave ") radio was widely used for military and diplomatic communication, and could be intercepted at great distances.

During the 1950s and 1960s, Peter van de Kamp of Swarthmore College made another prominent series of detection claims, this time for planets orbiting Barnard's Star.

During the 1950s, 1960s and 1970s, several events occurred which raised the public awareness of harm to the environment caused by man.

During the 1950s and 1960s, the electric guitar became the most important instrument in pop music.

During Japanese cinema's ' Golden Age ' of the 1950s, successful films included Rashomon ( 1950 ), Seven Samurai ( 1954 ) and The Hidden Fortress ( 1958 ) by Akira Kurosawa, as well as Yasujirō Ozu's Tokyo Story ( 1953 ) and Ishirō Honda's Godzilla ( 1954 ).

During Indian cinema's ' Golden Age ' of the 1950s, it was producing 200 films annually, while Indian independent films gained greater recognition through international film festivals.

During the 1950s and 60s, Afghanistan was able to use the Russian and American need for allies during the Cold War as a way to receive economic assistance from both countries.

During his career as a director, he retained an early ambition to teach science, and after his career declined in the 1950s he made some educational TV films related to science subjects.

During World War II, the urgent need for cheap, available food preservatives led to it being used again, but it was finally banned in the 1950s.

During the 1950s, when the independence of Ghana was in sight, demands grew for a separate Ewe state, an idea that Kwame Nkrumah, leader of the Gold Coast independence movement, opposed.

During the early 1950s, Groucho described his perfect woman: “ Someone who looks like Marilyn Monroe and talks like George S. Kaufman .”

During the late 1950s, high-stakes games such as Twenty One and The $ 64, 000 Question began a rapid rise in popularity.

During the 1950s — as a result of these improvements and the strong international export prices — beef, cotton, and coffee became significant export products for the first time.

During the later 1950s, Great Britain emerged as a producer of horror films.

During the 1950s, Holden dominated the Australian car market.

During the 1950s and 1960s the skyline of London altered dramatically as tower blocks were erected, although these later proved unpopular.

During that time Alboin turned his attention to Tuscany, but signs of factionalism among his supporters and Alboin's diminishing control over his army increasingly began to manifest themselves.

During colonial times, the Spanish decided that El Salvador would produce and export indigo, but after the invention of synthetic dyes in the 19th century, Salvadoran authorities and the newly created modern state turned to coffee as the main export of the economy.

During the Italian Renaissance, for example, translators such as Ficino and Pico della Mirandola turned their attention to the classical literature of Neoplatonism, and what was thought to be the pre-Mosaic tradition of Hermeticism.

During World War II ( 1939 – 1945 ) the Rock was again turned into a fortress and the civilian residents of Gibraltar were evacuated.

During World War II Stalin had supported the dictator of China, Chiang Kai-Shek, as a bulwark against Japan and had turned a blind eye to Chiang's mass killings of communists.

During his final year at Columbia, Jarmusch moved to Paris, for what was initially a summer semester on an exchange program but turned into ten months.

During Kristallnacht, the Jewish synagogue and homes were destroyed, and in 1938 the local Jewish cemetery was vandalised, while a cemetery shrine was turned to stable by German soldiers.

During these " Boston Tech " years, MIT faculty and alumni repeatedly rejected overtures from former MIT faculty turned Harvard University president Charles W. Eliot, to merge MIT with Harvard College's Lawrence Scientific School.

During the election, 78. 87 per cent of the 209, 000 registered voters turned out at the polls.

During a train-ride through a flooded area where an entire tribe was said to have seen the dinosaur, the locomotive suddenly derailed and turned over.

During the First World War, the Egyptology department was out of action and so Murray turned her attention to another subject, the history of witchcraft in Europe.

During the 1990s, Gell-Mann's interest turned to the emerging study of complexity.

During the 15th century, sentiment in Europe increasingly turned against the enslavement of Christians and the Church denounced such practices, but this did not extend to unbelievers.

During World War II, Volkswagen production turned to the military version of the Volkswagen Beetle, the Kübelwagen, 52, 000 produced, and Schwimmwagen, 14, 000 produced.

During the course of their journeys, the three encounter enemies and obstacles both sacred and profane, including: the Saint of Killers, an invincible, quick-drawing, perfect-aiming, come-lately Angel of Death answering only to " He who sits on the throne "; a disfigured suicide attempt survivor turned rock-star named Arseface ; a serial-killer called the ' Reaver-Cleaver '; The Grail, a secret organization controlling the governments of the world and protecting the bloodline of Jesus ; Herr Starr, ostensible Allfather of the Grail, a megalomaniac with a penchant for prostitutes, who wishes to use Custer for his own ends ; several fallen angels ; and Jesse's own redneck ' family ' — particularly his nasty Cajun grandmother, her mighty bodyguard Jody, and the ' animal-loving ' T. C.

During the World War II Occupation of Czechoslovakia, the Škoda works was turned into part of Reichswerke Hermann Göring serving the German World War II effort.

During presentations to upper management he often turned to his comic creations to add humor.

During a typical raid, the lights were turned on, and customers were lined up and their identification cards checked.

During the rainy night, Key had witnessed the bombardment and observed that the fort's smaller " storm flag " continued to fly, but once the shell and Congreve rocket barrage had stopped, he would not know how the battle had turned out until dawn.

During 1989 Prost began to contemplate starting his own team, as his relationship with his McLaren teammate, Ayrton Senna, had turned sour.

During this time the Germans turned the city and its environs into a major base for submarines ( DORA 1 ), and also contemplated a scheme to build a new city for 300, 000 inhabitants, Nordstern (" Northern Star "), centred 15 km ( 10 mi ) southwest of Trondheim, near the wetlands of Øysand in the outskirts of Melhus municipality.

During February 1975, after winning the leadership election, Margaret Thatcher refused to offer Powell a Shadow Cabinet place because " he turned his back on his own people " by leaving the Conservative Party exactly 12 months earlier and telling the electorate to vote Labour.

During the same period the behavior of his troops worsened and turned disastrous.

During a little more than a decade, from the late 1810s to the early 1830s, her literary production turned her into the most famous woman author in Germany.

During the 1970s, there were major efforts to find processes that could produce deuterium, which turned out to be a way of producing isotopes other than deuterium.