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SprueStack Zero Hour: WW2 day by day

18 August 1940

What happened on this day in the Second World War, from 1939 to 1945, with a source for every entry.

About this page

Each day we list events from the Second World War that happened on that date, from 1939 to 1945. Every entry names its source and links to it, so you can read further. Entries are sourced and machine-screened before they go up, a subset is human-reviewed, and we add more over time.

6 of 7 sourced entries for this date, chosen by the editor.

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Entries

  1. At sea

    President Roosevelt and Prime Minister MacKenzie King of Canada sign Ogdensburg Agreement, providing for Permanent Joint Board for the Defense of the United States and Canada (see 26 August 1940).

    Source US Navy chronology (NHHC) (opens external site)

  2. The Hardest Day air battle, part of the Battle of Britain, takes place. At that point, it is the largest aerial engagement in history with heavy losses sustained on both sides.

    Source Wikipedia (opens external site)

  6. Mediterranean Theater

    THOR mission records show at least 4 Allied sorties (8 recorded unit missions) in the Mediterranean Theater on 1940-08-18, flown by RAF. Targets included ITALY.

    Source US Air Force THOR (opens external site)

    THOR is a secondary compilation with known gaps, not a complete record.

The full list for this date is being cleaned and will return soon.

Sources listed with each entry. Spotted an error? Tell us.

18 August in other years 19411942194319441945

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