During World War II van Gulik translated the 18th-century detective novel Dee Goong An into English under the title Celebrated Cases of Judge Dee ( first published in Tokyo in 1949 ).

During the Age of Enlightenment in 18th-century Europe, the academy started to change in Europe.

During his excavations at Iona in the period 1964 – 1974, Richard Reece discovered an 18th-century ha-ha to protect the abbey from cattle.

During the 18th-century exploration of the Villa by tunnelling, from 1752 to 1754 there were recovered carbonized papyrus rolls containing thirty-six treatises attributed to Philodemus.

During the war, we set up schools for the teaching of psychological warfare, which included the teaching of propaganda, both black and white and the various shades of grey in between.

During the Cold War, U. S. Navy P-3 Orion antisubmarine warfare squadrons patrolled the North Atlantic Ocean for Soviet Navy submarines and surface warships.

During the 19th century, the development of mines led to a new type of naval warfare.

During the Japanese occupation, the Dayaks played a role in guerilla warfare against the occupying forces, particularly in the Kapit Division, where headhunting was temporarily revived towards the end of the war.

During the war against the Sandinista government, the contras carried out many violations of human rights, and evidence suggests that these were systematically committed as an element of warfare strategy.

During pre-Columbian warfare, Aztec nations were known to have used drums to send signals to the battling warriors.

During the war of 1918 there were two kinds of Red and White political violence: ( i ) a calculated part of the general warfare, and ( ii ) more local, personal murders and corresponding acts of revenge.

During World War I, the United States Navy acquired large numbers of privately owned and commercial ships and craft for use as patrol vessels, mine warfare vessels, and various types of naval auxiliary ships, some of them with identical names.

During the Sino-Japanese War, Mao advocated a strategy of avoiding open confrontations with the Japanese army and concentrating on guerrilla warfare from his base in Yan ' an, while leaving the KMT to take on the brunt of the fighting and suffer tremendous casualties.

During a lull in the warfare, Gustavus Adolphus hurried back to Stockholm to await the arrival of the baby.

During this millennium, fortifications changed warfare, and in turn were modified to suit new tactics, weapons and siege techniques.

During the early months of World War I, it was soon discovered that the Pickelhaube did not measure up to the demanding conditions of trench warfare.

During the Renaissance and the Early Modern period, siege warfare dominated the conduct of war in Europe.

During the Warring States Period in China ( 481 – 221 BC ), warfare lost its honorable, gentlemen's duty that was found in the previous era of the Spring and Autumn Period, and became more practical, competitive, cut-throat, and efficient for gaining victory.

During the Ming Dynasty ( AD 1368 – 1644 ), the Chinese were very concerned with city planning in regards to gunpowder warfare.

During the Renaissance and the Early Modern period, siege warfare continued to dominate the conduct of the European wars.

During this time period warfare broke out again between the two states and Emperor Eskender invaded Dakkar where he was stopped by a large Adalite army who destroyed the Solomonic army to such an extent that no further expeditions were carried out for the remaining of Eskender's reign.

During World War I, an invasion attempt by the British was thwarted by German General Paul von Lettow-Vorbeck at the Battle of Tanga, who then mounted a drawn out guerrilla warfare campaign against the British.

During World War II, U-boat warfare was the major component of the Battle of the Atlantic, which lasted the duration of the war.

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 these two or three years of incessant political intrigue and warfare, it was not to be expected that the Lateran council should accomplish much.

During the 340s BC, the Samnites were engaging in warfare with the Roman Republic in a dispute known as the Samnite Wars, with the Romans securing rich pastures of northern Campania during the First Samnite War.

During the Cold War, the explicit threat of nuclear warfare to force an opponent to perform an action was rare in that most nations were allies of either the Soviet Union or the United States.

Tawfiq Jarrar was accorded the unique title, " son of the great " ( salil al-akabir ) in Haifa, in recognition of his family's status and his entrepreneurial efforts. During the Ottoman era, Jenin was plagued by local warfare between members of the same clan.

During World War I, German troops referred to as pioneers, who were early combat engineers or sappers and stormtroopers began using two types of hand grenades in trench warfare operations against the French to clear opposing trenches of troops.

During the late 2nd century, the main ethnic change in the northern Black sea region was the immigration, from the Vistula valley in the North, of the Goths and accompanying Germanic tribes such as the Taifali and the Hasdingi, a branch of the Vandal people.

During the 1st millennium BC, they were spoken across Europe, in the Iberian Peninsula, from the Atlantic and North Sea coastlines, up the Rhine valley and down the Danube valley to the Black Sea, the Upper Balkan Peninsula, and in Galatia in Asia Minor.

During the American Civil War, the oil-producing region spread over much of western Pennsylvania, up into western New York state, and down the Ohio River valley into the states of Ohio, Kentucky, and the western part of Virginia ( now West Virginia ).

During the 17th century, a Lunda chief and warrior called Mwata Kazembe set up an Eastern Lunda kingdom in the valley of the Luapula River.

During the rule of the 7th Kirat King Jitedasti, Lord Gautam Buddha is said to have come to the valley with his several disciples and to have visited holy places of Swayambhu, Guheswari, etc., and to have preached his religious teaching.

During his stay in the valley, he is said to have four stupas built around Patan in the four cardinal directions and one in the centre.

During the last ice age, the basin now filled by the bay was a large linear valley with small hills, similar to most of the valleys of the Coast Ranges.

During World War I an aerodrome had been built on the downs just to the west of the circle and, in the dry valley at Stonehenge Bottom, a main road junction had been built, along with several cottages and a cafe.

During the Christmas and Easter seasons, the Lewiston Jaycees have two large lighted displays on the Lewiston Hill ( technically, the Washington side, and specifically, in Whitman County, above Clarkston in Washington state ), visible from nearly everywhere in the valley.

During the height of the Indus valley civilization about 2000 BC, the Harappan colony now known as Shortugai was established near the lapis mines.

During the 1850s, gold and silver were extracted in the valley.

During the last ice age, glaciers filled the canyons leading to Long Valley, but the valley floor was clear of ice.

During the war the valley surrounding the western end of the river also became the focal point of a series of dogfights for air superiority over North Korea, earning the nickname " MiG Alley " in reference to the MiG-15 fighters flown by the combined North Korean, Chinese and Soviet forces.

During the 19th century, the river became a principal means of navigation in the upper Ohio valley, especially for the transport of coal.

During the Crusades, on May 7, 1104, a decisive battle was fought in the Balikh River valley, commonly known as the Battle of Harran.

During a hunting expedition with his friend Henry Weidner, the two came upon a lush green valley with thousands upon thousands of acres of virgin forest.

During the Ipswichian Stage, though the Wash River probably flowed by way of the site of the Silver Pit, the tunnel valley will not have been formed at this stage as its alignment seems inconsistent.

During the mining era the valley was known as the " garden " for the mining regions.

During this time, the Mississippi River cut a valley between what is now Lafayette and Baton Rouge.

During the Pleistocene Epoch continental glaciers scraped away soil and steepened cliffs on hills around this valley, particularly on Mounts Tekoa and Shatterack east of the river, and on Turtle Mountain standing in the middle of the valley.

During the winter of 1855-56, while Sam Lockhart and other settlers had gone from the valley for provisions, local native Americans came into the area and finding only Mr Bowles, Mr Lockhart and Mr Rogers left, made an attack on them, driving them from their homes to the top of Fall River butte, where the three men were massacred, winding up their work by burning their dwellings and destroying all the machinery intended for the mill.

During the war, settlements throughout the Susquehanna valley were attacked by Loyalists and Native Americans allied with the British.