March 5: Lei Feng Day in the People's Republic of China.
- 1770 – The pelting of British soldiers with snowballs soon escalated into a riot in Boston, Massachusetts, leaving at least five civilians dead.
- 1824 – Britain officially declared war on Burma, beginning the First Anglo-Burmese War.
- 1850 – The Britannia Bridge, a tubular bridge of wrought iron rectangular box-section spans crossing the Menai Strait between the island of Anglesey and the mainland of Wales, opened.
- 1872 – American entrepreneur and engineer George Westinghouse patented the air brake for trains to stop more reliably.
- 1946 – The term " Iron Curtain" was popularized by former British Prime Minister Winston Churchill (pictured) during a speech at Westminster College in Fulton, Missouri, USA.
- 1970 – The Nuclear Non-Proliferation Treaty, an international treaty to limit the spread of nuclear weapons, entered into force.
- 1999 – Paul Okalik was elected as the first Premier of the Canadian territory of Nunavut.
March 5: Lei Feng Day in the People's Republic of China.
- 1770 – The pelting of British soldiers with snowballs soon escalated into a riot in Boston, Massachusetts, leaving at least five civilians dead.
- 1824 – Britain officially declared war on Burma, beginning the First Anglo-Burmese War.
- 1850 – The Britannia Bridge, a tubular bridge of wrought iron rectangular box-section spans crossing the Menai Strait between the island of Anglesey and the mainland of Wales, opened.
- 1872 – American entrepreneur and engineer George Westinghouse patented the air brake for trains to stop more reliably.
- 1946 – The term " Iron Curtain" was popularized by former British Prime Minister Winston Churchill (pictured) during a speech at Westminster College in Fulton, Missouri, USA.
- 1970 – The Nuclear Non-Proliferation Treaty, an international treaty to limit the spread of nuclear weapons, entered into force.
- 1999 – Paul Okalik was elected as the first Premier of the Canadian territory of Nunavut.