November 29, 2024 | Jesse Singer

Timeline: The First 10 Days Of WWII


How It Began

The Second World War officially began on September 1, 1939 with Germany's invasion of Poland. Six years later, it officially ended. A lot happened in those six years. But a lot happened in those first 10 days as well. Including...

September 1, 1939

Germany begins their invasion of Poland at 4:45am—when the German Schleswig-Holstein battleship fires on the Polish military transit depot at Westerplatte in the Free City of Danzig. Polish forces are able to repulse that attack.

The Nazi-Soviet Invasion Of Poland, 1939Associated Press photographer, Wikimedia Commons

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September 1, 1939

At the same time as the Westerplatte attacks, the German Luftwaffe attacks targets in Poland, including Wieluń—which becomes the first town to be carpet bombed by the Germans in the war.

Wieluń after German Luftwaffe bombing the 1st of September 1939Unknown Author, Wikimedia Commons

September 1, 1939

German and Slovak units pass the Polish border in the North and South at 6am.

Danzig Police At Polish BorderHans Sönnke, Wikimedia Commons

September 1, 1939

The previously mentioned Free City of Danzig is annexed by Germany.

Free City of Danzig 1 September 1939, WW2Sönnke, Hans, CC BY-SA 3.0 DE, Wikimedia Commons

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September 1, 1939

During his September 1st Reichstag speech, Hitler cites a number of Polish attacks earlier in the year as the reason for Germany declaring war on them. What he failed to mention was that those "attacks" were all German-planned false flag operations designed to appear like Polish aggression.

Adolf Hitler observes German soldiersUnknown Author, Wikimedia Commons

September 1, 1939

Italy announces it will be "non-belligerence" in the conflict. Meanwhile, Denmark, Estonia, Finland, Latvia, Norway, Sweden, and Portugal all declare neutrality.

Benito Mussolini Portrait As DictatorUnknown Author, Wikimedia Commons

September 1, 1939

The British and French ambassadors demand that the Germans stop their aggressive actions and withdraw from Poland

Sir Nevile Henderson in suitDorneth, CC BY-SA 3.0 DE, Wikimedia Commons

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September 1, 1939

The general mobilization of the British Armed Forces is ordered by British War Secretary Leslie Hore-Belisha.

Leslie Hore-Belisha in suitBassano Ltd, Wikimedia Commons

September 1, 1939

US President Franklin D Roosevelt asks all European powers to avoid bombing civilian and unfortified cities.

Hitler responds right away, saying that he will abide by the request, as does Poland and the British Prime Minister, Neville Chamberlain.

Franklin D. Roosevelt official portraitLeon Perskie, CC BY 2.0, Wikimedia Commons

September 1, 1939

Britain, Germany, and France initiate wartime blackouts.

Blackout during WW2Ministry of Information Photo Division Photographer, Wikimedia Commons

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September 1, 1939

 Civil liberties are suspended in the Slovak State.

Adolf Hitler In Bratislava, 1938Unknown Author, Wikimedia Commons

September 2, 1939

France and Britain approve war budgets.

Screenshot of World War II in Colour (2009)NM Productions, World War II in Colour (2009)

September 2, 1939

France and Britain agree to issue an ultimatum to Germany the next day.

World War II in Colour screenshotNM Productions, World War II in Colour (2009)

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September 2, 1939

France and Switzerland begin general mobilization of their armed forces.

Screenshot of World War II in Colour (2009)NM Productions, World War II in Colour (2009)

September 3, 1939

9am: Britain gives their ambassador to Berlin instructions on delivering the ultimatum that they had agreed on the day before.

British ambassador Germany 1939, Nevile HendersonYukioSanjo, CC BY-SA 3.0, Wikimedia Commons

September 3, 1939

11am: the deadline for the ultimatum passes without any response from Germany.

Hitler And Von Brauchitsch 1941Unknown Author, Wikimedia Commons

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September 3, 1939

11:15am: Prime Minister Neville Chamberlain makes the announcement to the British people that their country is now at war with Germany.

Neville Chamberlain During The Second World WarKeating, G, Wikimedia Commons

September 3, 1939

The UK Parliament passes the National Service Act 1939, which initiates full conscription of all able-bodied males aged 18-41 into the British Armed Forces.

World War II in Colour screenshotNM Productions, World War II in Colour (2009)

September 3, 1939

Not long after Britain's declaration of war, the British cruise ship SS Athenia—heading from Glasgow, UK to Montreal, Canadais torpedoed by a German submarine. 112 passengers and crew members perish in the attack. Thus begins the "Battle of the Atlantic".

Battle of the AtlanticTomlin, H W (Lt), Wikimedia Commons

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September 3, 1939

12pm: France issues their previously agreed ultimatum to Germany.

Screenshot of World War II in Colour (2009)NM Productions, World War II in Colour (2009)

September 3, 1939

5pm: France's ultimatum goes unanswered and they declare war on Germany.

Screenshot of World War II in Colour (2009)NM Productions, World War II in Colour (2009)

September 3, 1939

Prime Minister Chamberlain forms a new War Ministry and a more powerful war cabinet. Members of this new cabinet include: Chamberlain, Sir Samuel Hoare, Sir John Simon, Lord Halifax, Leslie Hore-Belisha, Sir Kingsley Wood, Lord Chatfield, Lord Hankey, and Winston Churchill.

Churchill and Chamberlain in suitsUnknown Author, Wikimedia Commons

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September 3, 1939

Because of Britain's declaration, both Australia and New Zealand also declare themselves at war with Germany.

Australian troops in WW2George Silk, Wikimedia Commons

September 3, 1939

Ireland, the Netherlands, and Belgium all declare their neutrality.

Belgian Refugees On The Brussels-Louvain RoadKessell (Lt), War Office official photographer, Wikimedia Commons

September 3, 1939

The first warships sunk in the conflict are the Polish destroyer ORP Wicher and the minelayer ORP Gryf. Both are sunk by a Luftwaffe attack on the Polish port of Hel.

Polish destroyer ORP WicherJerzy Pertek, Wikimedia Commons

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September 4, 1939

The first British raid of WWII sees 15 Blenheim bombers launch a bombing raid on German ships in the Heligoland Bight. Seven aircraft are lost in the attack—but, although the bombers hit the pocket-battleship Admiral Scheer three times, the bombs all fail to explode.

Screenshot of World War II in Colour (2009)NM Productions, World War II in Colour (2009)

September 4, 1939

Japan sends a note to both sides announcing its plans to "avoid becoming involved" in the European conflict. Instead, they will focus on "settling the China incident".

Japanese Prime Minister Nobuyuki Abe in uniformUnknown Author, Wikimedia Commons

September 4, 1939

Argentina, Brazil, Mexico, Iran, Lithuania, and even Spain's Francisco Franco all announce their neutrality.

Francisco Franco 1930Unknown Author, Wikimedia Commons

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September 4, 1939

Following the previous day's sinking of the AtheniaHitler forbids any attacks on passenger ships

Reich President Paul von Hindenburg appoints Adolf Hitler as Reichskanzler.Unknown Author, CC BY-SA 3.0 DE, Wikimedia Commons

September 5, 1939

Britain passes the National Registration Act 1939, permitting the establishment of a register of the whole population.

Screenshot of World War II in Colour (2009)NM Productions, World War II in Colour (2009)

September 5, 1939

The Kingdom of Yugoslavia and The United States of America declare neutrality.

Franklin Roosevelt Signing DeclarationAbbie Rowe, Wikimedia Commons

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September 5, 1939

Germany declares that the Reich will not tolerate any hostile action against Romania.

Screenshot of World War II in Colour (2009)NM Productions, World War II in Colour (2009)

September 6, 1939

South Africa gets a new Prime Minister (Jan Smuts) and declares war on Germany.

Jan Smuts painting 1944William Timym, Wikimedia Commons

September 6, 1939

Friendly fire leads to the first British fighter pilot killed.

British fighter planes 1939Hensser H, Wikimedia Commons

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September 6, 1939

The 14th German army easily takes Kraków.

Screenshot of World War II in Colour (2009)NM Productions, World War II in Colour (2009)

September 6, 1939

Britain begins its naval blockade of shipping heading to Germany.

Blockade of Germany at sea from British shipsImperial War Museum London, Wikimedia Commons

September 6, 1939

Romania declares itself neutral.

King Carol II in uniformAgence de presse Meurisse, Wikimedia Commons

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September 7, 1939

France takes 10 divisions on a limited offensive into the German Saarland territory.

French soldiers in LauterbachPress Agency photographer, Wikimedia Commons

September 8, 1939

A "limited national emergency" proclamation by FDR increases military spending and grows America's armed forces.

Roosevelt in the early 1930sVincenzo Laviosa, Wikimedia Commons

September 8, 1939

Germany begins their mining of British waters with Portland Harbour.

Portland HarbourMark.murphy, Wikimedia Commons

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September 10, 1939

With unanimous consent in both houses of Parliament, Canada declares war on Germany.

William Lyon Mackenzie King 1942Yousuf Karsh, Wikimedia Commons

September 10, 1939

Bombing raids hit Warsaw for the first time.

Bombing of Warsaw in World War IIJulien Bryan, Wikimedia Commons

September 10, 1939

Britain sinks the first submarine of the conflict. Unfortunately, the sub they sink is another British vessel (they mistook it for a German U-Boat).

HMSM TRITON underwayRoyal Navy official photographer, Wikimedia Commons

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September 11, 1939

The Kingdom of Saudi Arabia cuts diplomatic relations with Germany.

Adolf Hitler Meeting SoldiersUnknown author, Wikimedia Commons

September 11, 1939

Turkey's Prime Minister, Refik Saydam, informs the country's Parliament that Turkey will stay neutral for the time being.

And that was just the first 10 days of WWII...

Former Prime Minister of the Republic of Turkey Refik SaydamUnknown Author, Wikimedia Commons


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