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Selected: September 25
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1931 — , September 25

  • CBI - China: Day 8 of 154 of the Japanese Invasion of Manchuria.

1936 — , September 25

  • Spain: Day 71 of 985 of the Spanish Civil War.

1937 — , September 25

  • Spain: Day 436 of 985 of the Spanish Civil War.
  • CBI - China: Day 81 of 2,987 of the 2nd Sino-Japanese War.
    • Day 44 of 106 of the 2nd Battle of Shanghai.
    • Day 25 of 70 of the Battle of Taiyuan.

1938 — , September 25

  • USA:20,000 people attended a demonstration at New York Madison Square Garden to support Czechoslovakia.
  • Spain: Day 801 of 985 of the Spanish Civil War.
  • CBI - China: Day 446 of 2,987 of the 2nd Sino-Japanese War.
    • Day 107 of 139 of the Battle of Wuhan.

1939 — , September 25

  • Atlantic: German U-48 sinks the steamer ROYAL SCEPTRE and casts its crew adrift 300 miles from land.
  • Poland: Day 25 of 36 of Germany's Invasion of Poland. Luftwaffe bombs Warsaw with 420 planes. Casualties there have now reached 40,000 dead.
  • Poland: Day 9 of 20 of the USSR's Invasion of Poland.
  • CBI - China: Day 811 of 2,987 of the 2nd Sino-Japanese War.
    • Day 13 of 26 of the 1st Battle of Changsha.

1940 — , September 25

  • USA: Cryptanalyst Harry L Clark discovers the key to the mechanism used to encode and decode Japanese top secret messages, allowing the Allies to begin developing duplicate machines to quickly read diplomatic traffic.
    Spotlight...

    Fragment of an actual Purple machine from the Japanese embassy in Berlin, obtained by the US after the war

    The Japanese cipher machine code-named PURPLE, cracked by the US prior to WWII, was so complex that even the Germans were unable to decode messages sent through it.

    Japan's most secret diplomatic messages were encrypted with the Purple cipher machine, which was similar in concept to the German Enigma, but used stepping switches similar to a telephone dial instead of rotors.

    Harry L Clark correctly guessed that the Japanese device used stepping switches, which eventually led to successful decryption. As with the Enigma, the Allies built duplicate machines and the impact their code reading abilities had became immeasurable, making ULTRA, as it would be called, a secret weapon of enormous importance.

    Dates related to cryptology...

    Related WWII Store items...

  • Atlantic: Royal Canadian Navy armed merchant cruiser PRINCE ROBERT captures German merchant ship WESER off Manzillo, Mexico.
  • ETO - UK: Day 20 of 258 of the Blitz.
  • ETO - UK: Day 78 of 114 of the Battle of Britain.
  • Norway: Reich-Commissioner in Norway deposes King Haakon. All political parties are dissolved except for Vidkun Quisling's pro-Nazi party, which takes over as the government of Norway.
  • East Africa: Day 108 of 537 of Italy's East African campaign in the lands south of Egypt.
  • West Africa: Free French invasion forces, landed by Royal Navy ships, are repulsed by Vichy French troops at Dakar, French West Africa. Dakar is now the capital of Senegal.
  • CBI - China: Day 1,177 of 2,987 of the 2nd Sino-Japanese War.
    • Day 316 of 381 of the Battle of South Guangxi.
    • Day 37 of 42 of the Hundred Regiments Offensive.
  • CBI - Indochina: Day 4 of 5 of the Japanese invasion of Vichy French Indochina.
  • CBI - Indochina: Day 4 of 4 of the Battle of Lang Son.
  • CBI - Indochina: Day 2 of 3 of the Battle of Hai Phong.

1941 — , September 25

  • Russian Front - Finland: Day 96 of 164 of the Battle of Hanko. The Soviets will be forced off their leased naval base.
  • Russian Front - Finland: Day 22 of 28 of Finland's reconquest of East Karelia in southern Finland. The Soviets continue withdrawing from Finland back to Leningrad.
  • Russian Front - Finland: Day 89 of 142 of Operation SILVER FOX, a joint German-Finnish campaign to capture the Russian port of Murmansk in the Arctic. The German troops continue withdrawing back into northern Finland.
  • Russian Front - Finland: Day 87 of 140 of Operation ARCTIC FOX, a joint German-Finnish campaign against Soviet Northern Front defenses at Salla, Finland.
  • Russian Front: Day 96 of 167 of Germany's Operation BARBAROSSA, the overall invasion of the USSR.
  • Russian Front - North: Day 18 of 872 of the Siege of Leningrad. Hitler puts an end to attacking Leningrad ordering the city to be besieged and starve them out. He also ordered that after its foreseen surrender that the entire city to be leveled.
  • Russian Front - South: Day 49 of 70 of the Siege of Odessa, Ukraine.
  • Russian Front - South: Day 34 of 35 of the 1st Battle of Kiev, Ukraine. Battle comes to an end as the Soviets begin evacuating the city.
  • MTO - Libya: Day 169 of 256 of the Siege of Tobruk. Rommel, having discovered he had been given bad intelligence, withdraws his 21st Panzer Division back to the Libyan-Egyptian border.
  • East Africa: Day 473 of 537 of Italy's East African campaign in the lands south of Egypt.
  • CBI - China: Day 1,542 of 2,987 of the 2nd Sino-Japanese War.
    • Day 20 of 33 of the 2nd Battle of Changsha.

1942 — , September 25

  • ETO - Norway: RAF Mosquitos make a successful low level daylight raid on the Gestapo HQ in Oslo.
  • Russian Front - North: Day 383 of 872 of the Siege of Leningrad.
  • Russian Front - North: Day 144 of 658 of the Siege of the Kholm Pocket, USSR lays siege to the Kholm Pocket but the Germans hold out for a about a year and a half.
  • Russian Front - Center: Day 58 of 64 of the 1st Battle of Rzhev-Sychevka, Russia. Though it will end in a stalemate, it will keep German troops from going to Stalingrad.
  • Russian Front - South: Day 90 of 150 of Germany's CASE BLUE, the failed offensive to take the Caucasus oil fields.
  • Russian Front - South: Day 34 of 165 of the Battle of Stalingrad, the bloodiest battle in human history.
  • MTO - Libya: US B-24s attack Benghazi.
  • East Africa: Day 144 of 186 of the Battle of Madagascar.
  • CBI - China: Day 1,907 of 2,987 of the 2nd Sino-Japanese War.
  • PTO - Alaska: Day 111 of 435 of the Battle of Kiska, Aleutian Islands. The US and Canada will defeat the Japanese invaders.
  • PTO - Malaya: Day 219 of 357 of the Battle of Timor Island, a long guerrilla war ending in Japanese victory.
  • PTO - New Guinea: Day 67 of 119 of the Battle of the Kokoda Track. The Australians continue pushing back the Japanese troops. This will become an Allied victory.
  • PTO - Solomon Islands: Day 50 of 187 of the Battle of Guadalcanal.

1943 — , September 25

  • ETO: US 8th Air Force: B-26s hit one airfield in France.
  • Russian Front - North: Day 748 of 872 of the Siege of Leningrad.
  • Russian Front - North: Day 509 of 658 of the Siege of the Kholm Pocket, USSR lays siege to the Kholm Pocket but the Germans hold out for a about a year and a half.
  • Russian Front - Center: Day 50 of 57 of the 2nd Battle of Smolensk, Russia. The Soviets capture Smolensk and Roslavl, over 200 miles west of Moscow.
  • Russian Front - Center: Day 40 of 48 of the Battle of Bryansk, Russia. German troops continue evacuating Bryansk.
  • Russian Front - South: Day 33 of 122 of the Battle of the Lower Dnieper River, USSR.
  • MTO - Italy: The RAF, US 9th and 12th Air Forces provide the air cover for the Allied ground troops.
  • CBI - China: Day 2,272 of 2,987 of the 2nd Sino-Japanese War.
  • PTO - New Guinea: Day 7 of 219 of the Battle of Shaggy Ridge. This will become an Allied victory.
  • PTO - New Guinea: Day 4 of 162 of the Battle of the Huon Peninsula. This will result as an Allied victory.
  • PTO - Solomon Islands: Day 42 of 56 of the Battle of Vella Lavella. The Allies will win this one.

1944 — , September 25

  • ETO - France: Day 56 of 284 of the Battle of Brittany.
  • ETO - Belgium: Day 24 of 62 of the liberation of Belgium. The Canadians begin an all-out attack on the German stronghold at Calais, France.
  • ETO - France: Day 11 of 236 of the Siege of Dunkirk.
  • ETO - Netherlands: Day 9 of 9 of Operation MARKET GARDEN. The British evacuate the remaining paratroopers at Arnhem, but only 2,163 men out of nearly 10,000 are able to return. The operation has failed. Allied hopes of ending the war by Christmas are dashed.
  • ETO - Germany: Day 7 of 145 of the Battle of Hürtgen Forest.
  • ETO: US 8th Air Force: B-24s and B-17s attack multiple targets in Germany.
  • ETO - Norway: Vidkun Quisling's Ministers urge the Germans to end their occupation of Norway.
  • Russian Front - Finland: Day 11 of 223 of the Lapland War. Finland and Russia have joined forces to kick the Germans out of Finland's most northern province.
  • Russian Front - North: Day 9 of 10 of the Battle of Porkuni, Estonia.
  • Russian Front - North: Day 12 of 41 of the Battle of Riga, Latvia.
  • Russian Front - Center: Day 12 of 72 of the Battle into East Prussia and northern Poland.
  • Russian Front - South: Day 12 of 72 of the Battle of Belgrade, Yugoslavia.
  • MTO - Italy: US 12th Air Force fighters continue supporting the US 5th Army attacking at Monte Bastione, Torre Poggioli, Monte Gamberaldi and Monte Castelnuovo.
  • MTO - Greece: US 15th Air Force B-24s bomb Piraeus, Skaramanga, and Salamis harbors.
  • CBI - Burma: Day 178 of 302 of the Chinese Salween Offensive in Burma.
  • CBI - China: Day 2,638 of 2,987 of the 2nd Sino-Japanese War.
    • Day 162 of 259 of Japan's Operation ICHI-GO.
  • PTO - New Guinea: Day 286 of 597 of the Battle of New Britain.
  • PTO - New Guinea: Day 157 of 481 of the Battle of Western New Guinea.
  • PTO - Palau Islands: Day 11 of 74 of the Battle of Peleliu (Operation STALEMATE II).
  • PTO - Palau Islands: Day 9 of 36 of the Battle of Angaur.

1945 — , September 25

  • Norway: The last Russian soldier leaves Norwegian territory near Storskog at 8:55 pm.
  • Germany: The Nazi party is officially declared illegal in Germany.

Day-By-Day listings for September 25 were last modified on Monday, January 25, 2016
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