** 10 March 1803 – 26 April 1803 Johann Rudolf Dolder ( b. 1753 – d. 1807 )

* 1807: The Slave Trade Act was passed by the British Parliament on 25 March 1807, making the slave trade illegal throughout the British Empire.

Britain outlawed the slave trade on 29 March 1807 with the Slave Trade Act 1807 and the British Navy operating from Freetown took active measures to stop the Atlantic slave trade.

The Slave Trade Act was passed by the British Parliament on March 25, 1807, making the slave trade illegal throughout the British Empire, Wilberforce also campaigned for abolition of slavery in the British Empire, which he lived to see in the Slavery Abolition Act 1833.

* March 1 – Embargo Act of 1807 is repealed in the United States ; the Non-Intercourse Act replaces it.

* March 24 – Henry Wadsworth Longfellow, American author ( b. 1807 )

* March 7 – Baron de Breteuil, last prime minister of the French monarchy ( d. 1807 )

* March 10 – John Gunby, Maryland soldier in the American Revolutionary War ( d. 1807 )

* March 11 – Henry Benedict Stuart, pretender to the British throne ( d. 1807 )

* Josephine of Leuchtenberg ( born 14 March 1807 ), daughter of Eugene, 1st Duke of Leuchtenberg and Augusta of Bavaria

At times during the Napoleonic Wars, the islands were occupied by the British ; first from March 1801 to March 27, 1802, and then again from December 1807 to November 20, 1815, when they were returned to Denmark.

The embargo lasted from December 1807 to March 1809.

Whitney applied for a patent on October 28, 1793 ; the patent was granted on March 14, 1794, but was not validated until 1807.

He also began manufacturing pianos, but in March 1807 the warehouses occupied by his new firm were destroyed by a fire, resulting in a loss of about ₤ 40, 000.

The Embargo, which lasted from December 1807 to March 1809 effectively throttled American overseas trade.

The Act Prohibiting Importation of Slaves of 1807 (, enacted March 2, 1807 ) is a United States federal law that stated that no new slaves were permitted to be imported into the United States.

President Thomas Jefferson signed the bill into law March 2, 1807.

In the last four days of President Thomas Jefferson's presidency, the United States Congress replaced the Embargo Act of 1807 with the almost unenforceable Non-Intercourse Act of March 1809.

Prince Eugène was adopted by Napoleon on 12 January 1806 ; while excluded from the French empire's succession, he was given presumptive rights for him and his descendants in the male line to the throne of Italy in the absence of a second son of Napoleon on 16 February 1806, and hence on 20 December 1807 given the title of Prince de Venise (' Prince of Venice '), which had been instituted by article 9 of the decree of 30 March 1806 ( when the former Austrian province of Venice was united to Bonaparte's kingdom of Italy ) for the Heir Presumptive to Napoleon in Italy.

In March 2007, the Archbishop of Canterbury preached at Kennington Park to mark the passing of the Slave Trade Act 1807.

It was also the first full coalition in Britain since 1945, having been formed 70 years virtually to the day after the establishment of Winston Churchill's wartime coalition, although there had been the " Lib-Lab pact ", an agreement stopping short of a full coalition between the Labour and Liberal parties, from March 1977 until July 1978, when a series of by-election defeats had eroded Labour's majority of three seats which had been gained at the October 1974 election.

In March 1941, Roosevelt, with Congressional approval, provided Lend-Lease aid to the countries fighting against Nazi Germany with Britain.

It was first published in Britain by Routledge in March 1944 and was quite popular, leading Hayek to call it " that unobtainable book ," also due in part to wartime paper rationing.

* 1721 March – Philip V of Spain requested the restitution of Gibraltar to proceed to the renewal of the trade licences of Great Britain with the Spanish possessions in America.

However, Britain continued to hold Jews of " fighting age " and their families on Cyprus until March 1949.

Early in his term, Major presided over British participation in the Gulf War in March 1991 and negotiated " Game, Set and Match for Britain " at the Maastricht Treaty in December 1991.

On 31 March 1939, the British Prime Minister Chamberlain announced before the House of Commons the British “ guarantee ” of Poland, which committed Britain to go to war to defend Polish independence, though pointedly the “ guarantee ” excluded Polish frontiers.

On 29 March 1941, during a conversation with Matsuoka, Ribbentrop as instructed by Hitler told the Japanese nothing about the upcoming Operation Barbarossa, as Hitler believed that he could defeat the Soviet Union on his own and preferred that the Japanese attack Britain instead.

On March 11, 1803, Napoleon began preparing to invade Britain.

In March 1938, as the Anschluss was taking place, Goring ordered Felmy to investigate the prospect of air raids against Britain.

Great Britain and its colonies continued to use March 25 until 1752, which was when they ultimately adopted the Gregorian calendar.

With a Communist insurgency threatening Greece, and Britain financially unable to continue its aid, the President announced his Truman Doctrine on 12 March 1947, " to support free peoples who are resisting attempted subjugation by armed minorities or by outside pressures ", with an aid request for consideration and decision, concerning Greece and Turkey.

Great Britain and its American colonies reformed in 1752, where Wednesday, 2 September 1752 was immediately followed by Thursday, 14 September 1752 ; they were joined by the last Protestant holdout, Sweden, on 1 March 1753.

On 29 March 1961 Britain agreed that Tanganyika would become an independent state on 28 December 1961.

In March 2009, British family care activist and a best-selling novelist Erin Pizzey reportedly declined to comment on the temporary withdrawal by its publishers of the book Andrew Marr's History of Modern Britain following her complaint it had falsely linked her to The Angry Brigade.

In March 1936, in response to the German remilitarization of the Rhineland, King had the Canadian High Commissioner in London inform the British government that if Britain went to war with Germany over the Rhineland issue that Canada would remain neutral.

However with Britain entering the Crimean War in February 1854, Gladstone introduced his second budget on 6 March.

In the USA ( and sometimes in Britain ) the season is regarded as beginning at the solstice and ending on the following equinox – in the Northern Hemisphere, depending on the year, this corresponds to the period between 21 or 22 December and 20 or 21 March.

* March 17 – British Prime Minister Neville Chamberlain gives a speech in Birmingham, stating that Britain will oppose any effort at world domination on the part of Germany.

* March 24 – Marks the seventh successive year of the world wide boycott of all German exports initiated by front page declarations in Britain and the U. S. ' Judea declares war on Germany '

* March 10 – WWII: In Britain the Education Act lifts the ban on women teachers marrying.

* March 27 – In Britain, Dr. Beeching issues a report calling for huge cuts to the UK's rail network.

* March 10 – The first census is held in Great Britain.