During the 1920's the Abstractionists, the German Bauhaus group of industrial designers, and the new architects all had the dream of some well ordered utopia, or welfare state, in which their neat and logical constructions might find their proper place.

During the Western Allied invasion of Germany in April 1945, the airfield was seized by the United States Third Army, and used by the USAAF 354th Fighter Group which flew P-47 Thunderbolts from the aerodrome ( designated ALG R-82 ) from late April until the German capitulation on 7 May 1945.

During World War II, Bonn acquired military significance because of its strategic location on the Rhine River, which formed a natural barrier to easy penetration into the German heartland from the west.

During the Second World War, Bletchley Park was the site of the United Kingdom's main decryption establishment, the Government Code and Cypher School ( GC & CS ), where ciphers and codes of several Axis countries were decrypted, most importantly the ciphers generated by the German Enigma and Lorenz machines.

During the interwar period, aircraft and tank technologies matured and were combined with systematic application of the German tactics of infiltration and bypassing of enemy strong points.

During the Battle of France, the French, who made attempts to re-form defensive lines along rivers, were constantly frustrated when German forces arrived there first and pressed on.

During the Battle of France, the German blitzkrieg-style attack on France went through the Ardennes.

During the Battle of France in 1940, De Gaulle's 4th Armoured Division and elements of the British Expeditionary Force's 1st Army Tank Brigade both made probing attacks on the German flank, actually pushing into the rear of the advancing armoured columns at times.

During the First World War the German army used horses for logistics, 1. 4 million of them, in the 1939 – 45 war it used 2. 7 million horses.

During the German occupation of France he joined the Maquis ( FTP ), a part of the French Resistance.

During European Middle Ages, citizenship was usually associated with cities, see burgher, Grand Burgher ( German Großbürger ) and Bourgeoisie.

During the Battle of the Bulge, however, the fuses became known as the American artillery's " Christmas present " for the German army because of their effectiveness against German personnel in the open, when they frequently dispersed attacks.

During this time he also lost the potential advantage of the larger guns on his ships: they could commence firing at a longer range than the German ships.

During the 19th and early 20th century, many smaller or less developed languages saw their first encyclopedias, using French, German, and English role models.

During the First World War, German troops retreated into this territory from Kamerun because Spain was neutral during the war.

During the run-up to the German general election in 2005, which was held ahead of schedule, Stoiber created controversy through a campaign speech held in the beginning of August 2005 in the federal state of Baden-Württemberg.

During World War I, the German sabotage of the Black Tom Wharf ammunition depot damaged buildings on Ellis Island.

During and immediately following World War II Ellis Island was used to intern German merchant mariners and enemy aliens-American civilians or immigrants detained for fear of spying, sabotage, etc.

During the Siege of Paris in 1871, the North German Confederation, supported by its allies from southern Germany, formed the German Empire with the proclamation of the Prussian king Wilhelm I as German Emperor in the Hall of Mirrors at the Palace of Versailles, to the humiliation of the French, who ceased to resist only days later.

During the invasion of Poland and the Battle of France, Luftwaffe fighters — primarily the Messerschmitt Bf 109 — held air superiority, and the Luftwaffe played a major role in German victories in these campaigns.

During the 1960s and 1970s German mathematician Heinrich Heesch developed methods of using computers to search for a proof.

During these operations the Crown Prince won the reputation of a thorough soldier ; after peace was made and Saxony had entered the North German Confederation, he gained the command of the Saxon army, which had now become the XII army corps of the North German army, and in this position carried out the necessary re-organisation.

During the Achaemenid Persian Empire, around 600 BC the Persians first began to use the abacus.

During this persecution many bishops were exiled to the other ends of the Empire, ( e. g., St Hilary of Poitiers to the Eastern provinces ).

During Alexius II's reign, the Byzantine Empire was invaded by King Bela III losing Syrmia and Bosnia to the Kingdom of Hungary in AD 1181, later even Dalmatia was lost to the Venetians.

During his reign, Jerusalem became more closely allied with the Byzantine Empire, and the two states launched an unsuccessful invasion of Egypt.

During the first invasion, Thrace, Macedon and the Aegean Islands were added to the Persian Empire, and Eretria was duly destroyed.

* Mann, Horace, K. The Lives of the Popes in the Early Middle Ages, Vol III: The Popes During the Carolingian Empire, 858 – 891.

During his reign, Bayezid II consolidated the Ottoman Empire and thwarted a Safavid rebellion soon before abdicating his throne to his son, Selim I.

During the days of the Roman Empire, the settlement of Augusta Raurica was founded 10 or 20 kilometres upstream of present Basel, and a castle was built on the hill overlooking the river where the Basel Münster now stands.

During the Roman Empire, Roman concrete ( or opus caementicium ) was made from quicklime, pozzolana and an aggregate of pumice.

During most of the colonial period, Costa Rica was the southernmost province of the Captaincy General of Guatemala, which was nominally part of the Viceroyalty of New Spain ( i. e., Mexico ), but which in practice operated as a largely autonomous entity within the Spanish Empire.

During his reign the Empire conquered Thrace, Noricum, Pamphylia, Lycia and Judaea, and began the conquest of Britain.

During his reign, the Empire annexed the Kingdom of Mauretania and made it into a province.

During the Spanish Empire, approximately 550, 000 Spanish settlers migrated to Latin America.

During the American Civil War ( 1861 – 1865 ), the Union feared that the seceded Confederate States of America ( CSA ) would plan a northerly attack from Canada, which was still owned by the British Empire and remained neutral in the war.

During the Roman Empire, legionaries were issued a pugio ( from the Latin pugnō, or “ fight ”), a double-edged iron thrusting dagger with a blade of 7-12 inches.

During his reign, he also set about creating the Second Mexican Empire ( headed by his choice of Maximilian I of Mexico, a member of the House of Habsburg ), to regain France's hold in the Americas and to achieve greatness for the ' Latin ' race.

During the rule of Henry VIII an Act of Parliament declared that ' this realm of England is an Empire ... governed by one Supreme Head and King having the dignity and royal estate of the imperial Crown of the same '.

During the history of the Byzantine Empire, the Greek peninsula was occasionally invaded by the foreign peoples like Goths, Avars, Slavs, Normans, Franks and other Romance-speaking peoples who had betrayed the Crusades.

During the last years of the Russian Empire, in the early 20th century, many authors continued to write in the gothic fiction genre, including historian and historical fiction writer Alexander Valentinovich Amfiteatrov, Leonid Nikolaievich Andreyev, who developed psychological characterization, symbolist Valery Yakovlevich Bryusov, Alexander Grin, Anton Pavlovich Chekhov and Aleksandr Ivanovich Kuprin.

During its 47 years of existence, the German Empire operated as an industrial, technological and scientific giant, receiving more Nobel Prizes in science than Britain, France, Russia and the United States combined.

During the Thirty Years ' War, George William tried to remain neutral between the Roman Catholic forces of the Holy Roman Empire and the Protestant principalities.

During the later years of the Roman Empire, the Germanic peoples of northern Europe grew in strength to rival the Empire itself, and repeated organized attacks led to the Fall of the Western Roman Empire in AD 476, a date which traditionally marks the end of the classical period, and the start of the middle ages.