During WWII, an alpine team composed of Pierre Chevalier, Fernand Petzl, Charles Petit-Didier and others explored the Dent de Crolles cave system near Grenoble, France which became the deepest explored cave in the world (- 658m ) at that time.

During the Kingdom of Yugoslavia, censuses were conducted in 1931 and 1921 ; the census in 1941 was never conducted due to the outbreak of WWII.

During WWII and beyond, RCA set up several new divisions, for defense, space exploration and other activities.

* During WWII, Velvalee Dickinson, a spy for Japan in New York City, sent information to accommodation addresses in neutral South America.

During WWII, the FBI investigated 19, 649 cases of sabotage and concluded the enemy had not caused any of them.

During WWII, the Allies committed sabotage against the Peugeot truck factory.

During WWII, British subject Eddie Chapman, trained by the Germans in sabotage, became a double agent for the British.

During WWII the Jewish Savoye family was sent to concentration camps by the Nazis who took over the house and used it for storage.

During WWII, the Este Castle, adjacent to the Corso Roma, now known as the Corso Martiri della Libertà, was the site of an infamous massacre in 1943.

During this period after WWII many of Africa's colonies had gained their independence, however, those that assumed power continued to control the population the same as their previous oppressors.

During WWII the 1700 and 1800 ranges were also used for operational squadrons.

During WWII, a German U-boat sailed into Castries harbor and sank two allied ships.

During WWII, after the Axis aggression against Yugoslavia, Italy created the " Governatorato di Dalmazia " ( from 1941 to September 1943 ), so the Kingdom of Italy annexed temporarily even Spalato ( Split ), Cattaro ( Kotor ) and most of coastal Dalmatia.

During WWII, most officers were white and most black troops still served only as truck drivers and as stevedores.

During the early days of WWII ( i. e., before the US entered the war ), a small number of Americans of German origin returned to Germany ; generally they were immigrants or children of immigrants, rather than descendants of migrations more distant in time.

During WWII Pinewood was requisitioned and subsequently the Crown Film Unit, Army Film and Photographic Unit, RAF Film Unit and Polish Air Force Film Unit were based there.

During WWII, GIs from Massachusetts who were stationed overseas shared the cookies they received in care packages from back home with soldiers from other parts of the U. S. Soon, hundreds of GIs were writing home asking their families to send them some Toll House Cookies, and Wakefield was soon inundated with letters from around the world asking for her recipe.

During WWII Barksdale trained pilots, navigators, and bombardiers.

During the Korean War, the Lima Tank Depot resumed manufacturing, at a level expanded from WWII standards.

During WWII Roddis Lumber and Veneer produced plywood and other composites and was " the allies ' largest pre-fabricator of wood for Liberty Ships.

During WWII it was a North American Aviation plant that produced the P-51C and K Mustang variants.

During WWII, the European branches of O. T. O.

During World War II ( WWII ), both the British and the Americans recruited codebreakers by placing crossword puzzles in major newspapers and running contests for who could solve them the fastest.

During WWII he was stationed by the Army as a telephone linesman in Burma.

During a 1933 tsunami in Japan the sea glowed brilliantly at night.

During the Tsarist times, the Ainu living in Russia were forbidden from identifying themselves as such, since the Imperial Japanese officials had claimed that all the regions inhabited by the Ainu in the past or present, are a part of Japan.

During his first voyage in 1492, instead of reaching Japan as he had intended, Columbus landed in the Bahamas archipelago, at a locale he named San Salvador.

During this time, whilst touring Japan, they conceived and started their second record label, Ninja Tune, which continues to release diverse music by like-minded artists.

During the Middle Ages, there were various systems involving elections or assemblies, although often only involving a small amount of the population, the election of Gopala in Bengal region of Indian Subcontinent, the Polish-Lithuanian Commonwealth ( 10 % of population ), the Althing in Iceland, the Løgting in the Faeroe Islands, certain medieval Italian city-states such as Venice, the tuatha system in early medieval Ireland, the Veche in Novgorod and Pskov Republics of medieval Russia, Scandinavian Things, The States in Tirol and Switzerland and the autonomous merchant city of Sakai in the 16th century in Japan.

During his reign, the capital of Japan was moved from Nara ( Heijō-kyō ) to Nagaoka-kyō in 784.

During the closing stages of the war, Japan's fighter arm could not seriously challenge raids over Japan by American B-29s, and was largely relegated to Kamikaze tactics.

During World War I, many of the Germany possessions in the Pacific were conquered by Japan, who fought on the side of the Allies of World War I and was active in the Asian and Pacific theatre of World War I.

During his visit to France, Iwakura Tomomi asked for French assistance in reforming Japan.

During this period, Japan developed thriving cities and castle towns and increasing commodification of agriculture and domestic trade, wage labor, increasing literacy and concomitant print culture, laying the groundwork for modernization, even as the shogunate itself grew weak.

During the Meiji period ( 1868 – 1912 ), leaders inaugurated a new Western-based education system for all young people, sent thousands of students to the United States and Europe, and hired more than 3, 000 Westerners to teach modern science, mathematics, technology, and foreign languages in Japan ( Oyatoi gaikokujin ).

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 the course of all three periods, Ribbentrop met frequently with leaders and diplomats from Italy, Japan, Romania, Spain, Bulgaria, and Hungary.

During this time period, prominent teachers who also influenced the spread of karate in Japan included Kenwa Mabuni, Chōjun Miyagi, Motobu Chōki, Kanken Tōyama, and Kanbun Uechi.

During the Edo Period in Japan, when Christianity was banned and punishable by death, some underground Christian groups venerated the Virgin Mary disguised as a statue of Kannon ; such statues are known as Maria Kannon.

During its years of colonial rule, Japan moved more than 1, 000 Japanese to the Marshall Islands although they never outnumbered the indigenous peoples as they did in the Mariana Islands and Palau.

During all this time he traveled extensively in Japan, particularly in the Kansai region teaching his aikido.

During the Edo period in Japan peasants were not allowed to eat meat and had a diet of primarily rice and soy beans to get their protein.

During Japan's occupation, sugar cane became the main industry of the islands, and labor was imported from Japan and associated colonies ( especially Okinawa and Korea ).

To eliminate any possible doubts, Nichiren decided to spend some time at Mount Kōya, the centre of esoteric Buddhism, and also in Nara, Japan ’ s ancient capital, where he studied the Ritsu sect, which emphasized strict monastic discipline and ordination. During this time, he became convinced of the pre-eminence of the Lotus Sutra and in 1253, returned to Seichoji.

During World War II, independent research groups in the United States, Russia, and Japan discovered a new class of synthetic materials, called ferroelectrics, which exhibited piezoelectric constants many times higher than natural materials.

During the 20th century, Imperial Japan and Nazi Germany ( towards Russian POW ) were notorious for atrocities against prisoners during World War II.

During World War II, nearly 500, 000 Purple Heart medals were manufactured in anticipation of the estimated casualties resulting from the planned Allied invasion of Japan.

During the 1960s, electrified high-speed railway systems were introduced in Japan and a few other countries.

During this year, Sosa accompanied President Fernandez of the Dominican Republic on several diplomatic trips including to the United States, Japan, and Taiwan.