* 1939 – 1945, the Second Battle of the Atlantic.

Armoured trains saw use during the 19th century in the American Civil War ( 1861 – 1865 ), the Franco-Prussian War ( 1870 – 1871 ), the First and Second Boer Wars ( 1880 – 81 and 1899 – 1902 ), the First ( 1914 – 1918 ) and Second World Wars ( 1939 – 1945 ) and the First Indochina War ( 1946 – 1954 ).

The Second World War broke out in 1939 with the German invasion of Poland.

File: Mao Fumei. jpg | Mao Fumei ( 毛福梅, 1882 – 1939 ) Died in the Second Sino-Japanese War during a bombardment.

Extermination camps ( or death camps ) were camps built by Nazi Germany during the Second World War ( 1939 – 45 ) to systematically kill millions of people by gassing and extreme work under starvation conditions.

* 1939 – The erroneous word " dord " is discovered in the Webster's New International Dictionary, Second Edition, prompting an investigation.

A 1939 Second World War-era baby's gas mask in Monmouth Regimental Museum.

After allying with Mussolini's Italy in the " Pact of Steel " and signing a non-aggression pact with the Soviet Union, the German dictator Adolf Hitler started the Second World War on 1 September 1939 attacking Poland and following a military build-up throughout the late 1930s.

In 1933 Wells predicted in The Shape of Things to Come that the world war he feared would begin January 1940, a prediction which ultimately came true just four months early, when the Second World War broke out in September 1939.

The Second Polish Republic was established and existed from 1918 to 1939.

Second Polish Republic ( until 1939 )

Following the outbreak of the Second World War in September 1939, Alexander brought the 1st Infantry Division to France, where, in late May 1940, he successfully led the division's withdrawal to Dunkirk.

The International Brigades () were military units made up of volunteers from different countries, who traveled to Spain to defend the Second Spanish Republic in the Spanish Civil War between 1936 and 1939.

When the Second World War broke out in 1939, he defied his party's line and volunteered for service.

* Watt, D. C. How War Came: The Immediate Origins of the Second World War, 1938 – 1939.

In the Second World War ( 1939 – 45 ) Kenya became an important British military base for successful campaigns against Italy in the Italian Somaliland and Ethiopia.

Upon the outbreak of the Second World War in September 1939, the government of Luxembourg observed its neutrality and issued an official proclamation to that effect on September 6, 1939.

* 1939 – Second Sino-Japanese War: Battle of Nanchang between the Kuomintang and Japan begins,

" German – Soviet Boundary and Friendship Treaty | Second Ribbentrop – Molotov Pact " of 28 September 1939.

The Soviet Union and Germany signed a non-aggression pact, the Molotov – Ribbentrop Pact, shortly before the German invasion of Poland which triggered the Second World War in 1939 and was followed by the Soviet invasion of Poland.

After the Second World War ( 1939 – 45 ), and the Tehran, Casablanca and Yalta Conferences, the Allies by the Berlin Declaration of June 5th, 1945 had assumed supreme authority over Germany.

In 1931, the Second Spanish Republic ( 1931 – 1939 ) turned into a civil war would be the prelude of World War II.

Critics of the textbook note the lack of detail about historical events such as the Siege of Leningrad ( 1941 – 44 ), the Gulag forced-labour camps, the Russo – Finnish Winter War ( 1939 – 40 ), the First Chechen War ( 1994 – 96 ), and the Second Chechen War ( 1999 – 2000 ), as serious factual inaccuracies ; most egregious, the critics propose, is the absence of the Holocaust ( 1933 – 45 ), and the glorification of the rule of Josef Stalin ( 1922 – 53 ).

* 1939 – World War II: Germany and the Soviet Union sign a non-aggression treaty, the Molotov-Ribbentrop Pact.

* 1939 – Nazi Germany mounts a staged attack on the Gleiwitz radio station, creating an excuse to attack Poland the following day thus starting World War II in Europe.

In 1939, coinciding with the start of World War II, Rene Dubos reported the discovery of the first naturally derived antibiotic, gramicidin from B. brevis.

Weil was in Finland when World War II broke out ; he had been traveling in Scandinavia since April 1939.

* 1939 – World War II: Italy invades Albania.

The Stadium was the scene Lou Gehrig's Farewell Speech in 1939, Don Larsen's perfect game in the 1956 World Series, Roger Maris ' record breaking 61st home run in 1961, and Reggie Jackson's 3 home runs to clinch Game 6 of the 1977 World Series.

During the Sino-Japanese War ( 1937 – 1945 ) and World War II ( 1939 – 1945 ), the Special Research Units of the Imperial Japanese Army, such as Unit 731, conducted human experimentation on thousands of Chinese, among others.

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.

* Bloody Sunday ( 1939 ), aka Bromberg Bloody Sunday, a massacre in Bydgoszcz, Poland, at the onset of World War II

Examples of this style of film include It's a Wonderful World ( 1939 ), The Shop Around the Corner ( 1940 ), Sabrina ( 1954 ), Annie Hall ( 1977 ), When Harry Met Sally ... ( 1989 ), Pretty Woman ( 1990 ), and Four Weddings and a Funeral ( 1994 ).

While most armies still maintained cavalry units at the outbreak of World War II in 1939, significant mounted action was largely restricted to the Polish, Balkan and Soviet campaigns.

There were plans for races at Zandvoort before World War II: the first street race was held on June 3, 1939.

After the outbreak of World War II in 1939, American communists argued that the United States should not get involved in the war on the side of the United Kingdom, since the Molotov-Ribbentrop Pact of nonaggression meant that the Soviet Union was at peace with Germany.

* 1939 – World War II: Pope Pius XII makes a Christmas Eve appeal for peace.

First synthesized in 1874, DDT's insecticidal properties were not discovered until 1939, and it was used with great success in the second half of World War II to control malaria and typhus among civilians and troops.

* 1939 – Indian Muslims observe a " Day of Deliverance " to celebrate the resignations of members of the Indian National Congress over their not having been consulted over the decision to enter World War II with Britain.

* 1939 – World War II: Battle of the River Plate – Captain Hans Langsdorff of the German Deutschland class cruiser ( pocket battleship ) Admiral Graf Spee engages with Royal Navy cruisers HMS Exeter, HMS Ajax and HMNZS Achilles.

* 1939 – 1945: In World War II many countries are occupied by Germany and the Soviet Union, where Esperanto organisations often were prohibited or Esperanto activities were limited in other ways.

Overt alliance with Germany was not possible due to the result of the First World War, but in general the period of 1918 to 1939 was characterised by economic growth and increasing integration to the Western world economy.

* During World War II, the secret protocol in Molotov-Ribbentrop pact enabled Winter War ( 1939 – 40 ), a Soviet attack on Finland.

One result was the creation by the American company MGM of an English studio MGM-British in Hertfordshire, which produced some very successful films, including A Yank at Oxford ( 1938 ) and Goodbye, Mr. Chips ( 1939 ), before World War II intervened.