During the Cold War, many countries built fallout shelters for high-ranking government officials and crucial military facilities.

During the second Persian invasion of Greece ( 480-479 BC ) Megara fought alongside the Spartans and Athenians at crucial battles such as Salamis and Plataea.

During the Kalmar Union ( 1397 – 1523 ), controlling Stockholm was crucial to anyone aspiring to control the kingdom, and the city was consequently repeatedly besieged by various Swedish-Danish fractions.

During each episode, he provided an omniscient viewpoint of the situations presented, and regularly interjected comical asides during crucial plot points ( often, during a freeze frame of a cliffhanger scene right before a commercial break ) and " down home " aphorisms.

During the pre-fight negotiations, in return for granting Hagler a larger share of the purse Leonard obtained several conditions which would be crucial to his strategy ; a large ring ( 24x24ft ), 12oz gloves and the fight was to be over 12-not 15-rounds.

During the 4th to the 6th century AD, this crucial border region between northern and southern states was much fought over ; its name and administrative status were consequently often changed.

During his time as an MP he wrote and campaigned for the Statute of Monopolies, which substantially restricted the ability of the monarch to grant patents, and authored and was instrumental in the passage of the Petition of Right, a document considered one of the three crucial constitutional documents of England, along with the Magna Carta and the Bill of Rights 1689.

During the years 1800 – 1845 great changes took place in the communications and transport of the town which were to have a crucial effect on promoting industrial growth.

During pre-trial proceedings in the divorce case, Armstrong's lawyers had sought to limit evidence of a sexual nature but his wife's attorneys said " it was crucial since the church leader alleged Mrs. Armstrong had breached an agreement of love and fidelity.

During a crucial residency at Leicester Square's Cavern Club, they were strongly supported by Sonny & Cher, who were living in London at the time.

During these crucial years, a number of the most prominent European scientists, especially physicists, immigrated to the United States, where they would do much of their most important work ; these included Hans Bethe, Albert Einstein, Enrico Fermi, Leó Szilárd, Edward Teller, Felix Bloch, Emilio Segrè, and Eugene Wigner, among many, many others.

During the Klingon invasion of Cardassia, he is crucial to exposing the Founder impersonating Klingon general Martok.

During this crucial crisis, however, no South Vietnamese unit broke or defected to the communists.

During his second term in the House, O ' Neill was selected to the House Rules Committee where he proved a crucial asset for the Democratic leadership, particularly his mentor, fellow Boston congressman and later Speaker, John William McCormack.

During his absence the British lost the crucial Battle of the Chesapeake leading to the surrender at Yorktown.

During the war, the Polish cavalry brigades and divisions took part in most of the notable battles, including the famous Battle of Warsaw, in which they played a crucial role in surrounding the withdrawing Red Army, and in the Battle of the Niemen, in which the cavalry was vital in breaking the enemy lines near Grodno.

During the second detective's testimony, the entire courtroom is starstruck and distracted from crucial evidence by the sudden appearance of Suzanne Somers, who would be portraying Beverly as the heroine of a television movie.

During World War II, as Assistant Secretary of War, McCloy was a crucial voice in setting U. S. military priorities.

During the war, President Abraham Lincoln was concerned that the slave states of Missouri, Kentucky, and Maryland in the crucial upper south might leave the Union to join the Confederate States of America.

During the 2nd and 3rd centuries, this form of bribery became a crucial part of any successful ruler in Rome.

During the subsequent fighting between royalist and parliamentary forces, Northumberland's control of the navy was a crucial factor in securing parliamentary victory As a result, Charles I removed Northumberland from the post of Lord High Admiral in late June 1642 and Northumberland relinquished the position.

During the late 1950s, Chief Judge Elbert Tuttle and his three colleagues John Minor Wisdom, John Brown, and Richard Rives became known as the " Fifth Circuit Four ", or simply " The Four ", for decisions crucial in advancing the civil rights of African-Americans.

During the match he won a potentially crucial leg and after pumping his fist and shouting " Get in there " he proceeded to a prolonged ourburst at the crowd.

During pre-season training in the summer of 1987, Mølby suffered a foot injury, which turned out to be a crucial turning point in his career.

During this precarious period of development the mother should continue to influence the growth of the child's conscience.

During the period from 1 July 1960 through 31 January 1961, additional research affiliations were effected with the U. S. Army Medical Research and Development Command to conduct research in procedures for quantitative electron microscopy, and for the study of biophysical and biological studies of the structure and function of ocular tissue.

During this period, a total of 762 exhibits were presented at 442 medical and scientific meetings.

During the period of this report, 37,470 new cases were entered into the various registries.

During this period, 7,827 teaching sets were distributed on loan.

During the period of this report, 63 panel exhibits depicting the latest developments in medical research were displayed.

During the period, the laboratory rendered centralized macropathological service to qualified requesters.

During the period from 1 July 1960 through 31 January 1961, the Medical Museum was required to move to Temporary Building `` S '' on the Mall from Chase Hall.

During the period of about 4 hours around sunset, skywave transmission conditions are building up until full nighttime conditions prevail ; ;

During the Civil War period Mr. Brown also invented the Brown & Sharpe formed tooth gear cutter, a basic invention which ultimately revolutionized the world's gear manufacturing industry by changing its basic economics.

During this period 7,484,268 members were received, yet the net membership now is only 9,910,741.

During the period of the Iberian Union ( 1580 – 1640 ), Portugal lost influence and power and made new enemies.

During the Romantic period, art came to be seen as " a special faculty of the human mind to be classified with religion and science ".< ref >

During the same period the Georgian states of Colchis and Tabal arose around the Black Sea and central Anatolia respectively.

During this same period, slave-holding border states had more free African-Americans and European immigrants than the lower South, which increased Southern fears that slavery was threatened with rapid extinction in this area.

During this period he published 18 plays and 3 novels, including the murder mystery The Red House Mystery ( 1922 ).

During this period winter sports were slowly introduced: in 1882 the first figure skating championship was held in St. Moritz, and downhill skiing became a trendy sport with English visitors early in the 20th century, as the first ski-lift was installed in 1908 above Grindelwald.

During the post-World War I period ski-lifts were built in Swiss and Austrian towns to accommodate winter visitors, but summer tourism continued to be important ; by the mid-20th century the popularity of downhill skiing increased greatly as it became more accessible and in the 1970s several new villages were built in France devoted almost exclusively to skiing, such a Les Menuires.

During the first 11 months of 2006, net imports grew by 21 percent to $ 1. 95 billion, while exports stood at $ 895 million, up 0. 3 percent from the same period in 2005.

During the first 11 months of 2006, the European Union remained Armenia's largest trading partner, accounting for 34. 4 percent of its $ 2. 85 billion commercial exchange during the 11-month period.

During January – February 2007, Armenia ’ s trade with Russia and other former Soviet republics was $ 205. 6 million ( double the amount from the same period the previous year ), making them the country ’ s number one trading partner.

During this period, spectator attendances dropped and media condemnation increased, but Simpson and Lawry flatly disregarded the public dissatisfaction.

During the Tokugawa period ( 1600 – 1868 ) the Ainu became increasingly involved in trade with Japanese who controlled the southern portion of the island that is now called Hokkaido.

During this period Agamemnon and his brother, Menelaus, took refuge with Tyndareus, King of Sparta.

During the Akkadian period, the Akkadian language became the lingua franca of the Middle East, and was officially used for administration, although the Sumerian language remained as a spoken and literary language.