During the 12th century, Trypillia was a fortress which defended approaches towards Kiev from the steppe.

During the early phases of the Big Bang, nucleosynthesis of hydrogen nuclei resulted in the production of hydrogen-1 ( protonium, < sup > 1 </ sup > H ) and helium-4 (< sup > 4 </ sup > He ), as well as a smaller amount of deuterium (< sup > 2 </ sup > H ) and very minuscule amounts ( on the order of 10 < sup >− 10 </ sup >) of lithium and beryllium.

During the initial development phases, Windows XP Professional x64 Edition was named Windows XP 64-Bit Edition for 64-Bit Extended Systems.

During the course of the program, Enterprise and the rest of the launch stack would be exposed to a punishing series of vibration tests simulating as closely as possible those expected during various phases of launch, some tests with and others without the SRBs in place.

During the submarine warfare phases of the First World War, the United States, fearing that the islands might be seized by Germany as a submarine base, again approached Denmark with a view to buying them.

During the Pleistocene period the Himalayan mountains were under glacial cover and climate was fluctuating between glacial and interglacial phases.

During cruise phases, Ulysses provided unique data.

During the initial phases of its development, it featured super deformed characters and monsters in battle, but was later changed to a style more consistent with the original series.

During the early phases of the Second Chechen War in 1999-2000, Zakayev commanded Maskhadov's presidential guard ; he was also involved in negotiations with Russian representatives before and during the resumed hostilities.

During World War II, Lane had one of the most remarkable, but little studied, phases of her career.

During some phases of the Soufriere Hills volcano on Montserrat, pyroclastic flows were filmed about 1 km offshore.

During the early phases of Operation Reinhard, victims were simply thrown into mass graves and covered with lime.

During the refresh stage, two phases may occur: present and delete, where present always occurs before delete.

During the early phases of the Civil War it was defended by Lady Isabel, a staunch Roman Catholic and Royalist.

During the sustain phase the missile carried out a series of pre-programmed manoeuvres, under autopilot control, representative of the mid-course and endgame phases of an engagement.

He also wrote many monographs on phases of the history of culture, including Manners, Custom and Dress During the Middle

During the early phases of perestroika, when private enterprise was introduced cautiously, Komsomol was given privileges with respect to initiating businesses, with the motivation of giving youth a better chance.

During the later phases of the Cold War, though, both countries developed accelerated testing programs, testing many hundreds of bombs over the last half of the 20th century.

During the three phases of the Jōmon period the population was primarily hunter-gatherer with some primitive agriculture skills and their behaviour was predominantly determined by changes in climatic conditions and other natural stimulants.

During the nascent phases of the Ottoman state, " Vizier " was the only title used.

During the earliest phases of his recording, Thirlwell's " groups " were composed of a plethora of fictional characters: Foetus Under Glass supposedly consisted of Frank Want, Phillip Toss and two Brazilian statistics collectors ; Scraping Foetus off the Wheel was claimed to be the work of Want and Clint Ruin.

During the three phases of daytime sleep, he noted significant reductions in blood pressure and heart rate.

During the stall and acceleration phases, in which torque multiplication occurs, the stator remains stationary due to the action of its one-way clutch.

During the first phases of registration, 150 parties were registered with the Ministry of Justice and Human Rights.

During the first phases of the American Revolution, the Province of New York Assembly could not reach a conclusion about the Continental Congress.

During the initial development phases, Windows XP Professional x64 Edition was named Windows XP 64-Bit Edition for 64-Bit Extended Systems.

During World War I, the Armenian Genocide, the Greek genocide ( especially in Pontus ), and the Assyrian Genocide almost entirely removed the ancient communities of Armenian and Assyrian populations in Anatolia, as well as a large part of its ethnic Greek population.

During the war, the Condor Legion undertook the bombing of Guernica which had a tremendous psychological effect on the populations of Europe.

During Europe's Great Famine of 1315 – 1317 there were many reports of cannibalism among the starving populations.

During the war, Gulag populations declined sharply due to a steep rise in mortality in 1942 – 43.

During the Tito-era of communist rule in Yugoslavia, the ethnic Albanian and Serb populations of Kosovo were strongly irreconcilable with sociological studies during the Tito-era indicating that ethnic Albanian and Serb peoples in Kosovo rarely accepted each other as neighbours or friends and few held interethnic marriages.

During allopatric ( from the ancient Greek allos, " other " + Greek patrā, " fatherland ") speciation, a population splits into two geographically isolated populations ( for example, by habitat fragmentation due to geographical change such as mountain building ).

During the Medieval period, various types of fowl were consumed as food, with the poorer populations ( such as serfs ) consuming more common birds, such as chicken.

During the Mongol rule, in 1334, Hubei was devastated by the world's first recorded outbreak of the Black Death, which spread during the following three centuries to decimate populations throughout Eurasia.

During mid-century, Lakeside was home to " significant " Native American, Spanish-speaking and Filipino populations.

During the 1968 – 69 school year, Park Terrace was designated a middle school serving all seventh and eighth graders in the district and East McKeesport served only 9th grade students for this one year ; it would serve other populations until its closure in 1982.

During the 1850s, tensions were very high between the native populations and the new settlers claiming the land as their own.

During his time with the land office, he traveled extensively throughout the territory, gaining an intimate knowledge of the geography and becoming acquainted with both the white and indigenous populations of Alaska.

During Ramadan, in the small towns and big villages with significant Muslim populations, Burmese Muslim youth organize singing teams called Jago ( in Urdu and Hindi ), which means " wake up.

During the Reichstag elections, the fifteen deputies of 1874, 1881, 1884 ( but one ) and 1887 were called protester deputies ( fr: députés protestataires ) because they expressed to the Parliament their opposition to the annexation by means of the 1874 motion in French language: « May it please the Reichstag to decide that the populations of Alsace-Lorraine that were annexed, without having been consulted, to the Germanic Empire by the treaty of Frankfurt have to come out particularly about this annexation.

During the centuries following the Roman withdrawal in 271, the population of the region was influenced by contact with the Byzantine Empire, neighboring Slavic, Magyar, and other smaller populations, and later by the Ottoman Turks.

To avoid any further territorial claims, both Greece and Turkey engaged in an " exchange of populations ": During the conflict, 151, 892 Greeks had already fled Asia Minor.

During the 1950s, the WJC conducted negotiations with a number of Arab governments, notably in North Africa, and pleaded with them to allow their Jewish populations to leave their native countries.

During the 8th to 11th centuries, the two populations intermarried and eventually all became Germanized.

During the course of these studies he found a way of comparing and grouping populations using a multivariate distance measure.

During the later twentieth century, industrial restructuring led to major losses of jobs, leaving formerly middle-class working populations suffering poverty, with some unable to move away for new work.

During prolonged outbreaks when stands become heavily defoliated, starvation can be an important mortality factor in regulating populations.

During this time, Ali Khan intensified his support in Muslim dominated populations, often raising the problems and challenges faced by the Muslim communities in the United Province.

During this early time in the history of Gaya, several waves of migration from the north, including the earlier-extant Gojoseon, Buyeo, and the Goguryeo, arrived and integrated with existing populations and stimulated cultural and political developments.

During the industrial revolution large populations congregated into urban areas detached from the agricultural lifestyle.

During WWII Italy occupied Montenegro ( in 1941 ) and annexed to the Kingdom of Italy the area of Kotor, where there was a small Roman community ( descendants from the populations of the renaissance Albania Veneta ).