By spring 1941, following Himmler's orders, ten concentration camps had been constructed in which inmates were subjected to forced labour.

By the end of 1941, the Soviet military had suffered 4. 3 million casualties and German forces had advanced 1, 050 miles ( 1, 690 kilometers ).

By December 1941, Hitler's troops had advanced to within 20 miles of the Kremlin in Moscow.

By the end of 1943, the Soviets occupied half of the territory taken by the Germans from 1941 – 1942.

By 1941, Germany had given up hope of evicting the Allies from the island and the constant air raids stopped.

By 1857 he had accumulated over 800 pages of notes and short essays on capital, landed property, wage labour, the state, and foreign trade and the world market ; this work did not appear in print until 1941, under the title Grundrisse.

By September 1941, Philby was working for Section V of MI6, responsible for offensive counter-intelligence.

By early 1941, Fuchs had returned temporarily to Edinburgh.

By the winter of 1941 – 1942 just 39 percent of the fighter force was operational and possessed just 60 more combat aircraft than it did in June 1941 despite its increased commitments.

By early 1941, portable centimetric airborne radars were being tested in American and British aircraft.

By the third week in February 1941, 680, 000 German troops were stationed on the Romanian-Soviet border.

By 1941, the official newspaper, El País, had adopted an overtly pro-German stance.

By 22 June 1941 there were only 1, 475 T-34s and KV series tanks available to the Red Army, and these were too dispersed along the front to provide enough mass for even local success.

By 1941, President Roosevelt and Prime Minister King made an executive agreement to build the joint hydro and navigation works, but this too failed to receive the assent of Congress.

By 1918 it became part of the newly formed Kingdom of Serbs, Croats, and Slovenes, and remained so until 1941, apart from a brief period of six months in 1920 when Skopje was controlled by the Yugoslav Communist Party.

By the end of 1941, Roosevelt had appointed seven justices and elevated Harlan Fiske Stone to Chief Justice.

By late 1941, the Army Research Center at Peenemünde possessed the technologies essential to the success of the A-4.

By November 1941, it was becoming known in the upper reaches of the Nazi leadership and government offices that Hitler intended all the Jews of Europe to be deported to the eastern territories and executed by whatever means.

* Robert A. Heinlein's By His Bootstraps ( 1941 ) features a plot in which a man interacts with different older versions of himself that travel by way of a " Time Gate ", with all the interactions revisited later in the story from the perspective of the now-older man, everything being tied together in a completely self-consistent way.

By the end of 1941, Germany occupied a large part of Europe and its military forces were fighting the Soviet Union, nearly capturing Moscow.

By 1941 the Italians had suffered defeats in Greece and against the British in Egypt.

By 1941 he was earning a good wage, enough to pay for music lessons with Alberto Ginastera, an eminent Argentine composer of classical music.

By 1941, the SD had been organized into the following sections:

By 1941, a rail tunnel was constructed as well.

By now she was sure she was going to have a baby, deciding it would be born in India or Burma that November.

By this time she had learned that it was futile to argue with her young husband, yet the uncomfortable fact remained: the American Congregationalists were sending them as missionaries to the Far East and paying their salaries.

By saying `` another emotional death '', she reveals that there has been a previous one, although she has not described it in words.

By the next morning, she had turned the paper over.

By relaxing the throat muscles and expanding the oral cavity well into the frontal sinuses, she could direct the vowel sounds into the most felicitous position for proper reproduction through her throat microphone.

By 1930, Agatha Christie found Poirot " insufferable ", and by 1960 she felt that he was a " detestable, bombastic, tiresome, ego-centric little creep ".

By him she was the grandmother of Emperors Isaac II Angelos and Alexios III Angelos.

By bringing part of mass of her body closer to the axis she decreases her body's moment of inertia.

By figuratively rolling her eyes at the hype, Peters gives us a rich, warm and comedically human Desiree, which reaches full impact when she pierces the facade with a nakedly honest, tears-on-cheek ' Send in the Clowns.

Professor Henry Higgins sings, " Look at her, a prisoner of the gutters / Condemned by every syllable she utters / By right she should be taken out and hung / For the cold-blooded murder of the English tongue.

By age twenty, she had met and befriended the important, and pivotal, landscape painter of the Barbizon School, Camille Corot, who excelled in figure painting as well.

By the summer of 1912 Heelis had proposed marriage and Beatrix had accepted, although she did not immediately tell her parents who once again disapproved because Heelis was only a country solicitor.

By now she was pretty well used to these funny ways of his.

By 1900 the demand for Beaux's work brought clients from Washington, D. C., to Boston, prompting the artist to move to New York City ; it was there she spent the winters, while summering at Green Alley, the home and studio she had built in Gloucester, Massachusetts.

By staying in their midst, she could live out her rejection of them more strongly.

By then she had seen the end of the wealth and the happiness of her family, and followed most of her children and several of her grandchildren to the grave.

By 1393, she was writing love ballads, which caught the attention of wealthy patrons within the court.

By the time of their break up, Elvira was pregnant, leading her family members to conceal her pregnancy until she gave birth to Diego in 1479.

By 84, Domitia had returned to the palace, where she lived for the remainder of Domitian's reign without incident.

By age nine, she was appearing on The Cas Walker Show on both WIVK Radio and WBIR-TV in Knoxville, Tennessee.

By the time of her death, she had outlived all her children except for King John and Eleanor, Queen of Castile.