Henry (Henry the Fowler) reached a truce with the raiding Magyars, and in 933 he won a first victory against them in the Battle of Riade. The Battle of Riade or Battle of Merseburg was fought between the troops of East Francia under King Henry I and the Magyars at an unidentified location in northern Thuringia along the river Unstrut on 15 March 933. The battle was precipitated by the decision of the Synod of Erfurt to stop paying an annual tribute to the Magyars in 932.
On 15 March 1900, Lord Roberts proclaimed an amnesty for all burghers, except leaders, who took an oath of neutrality and returned quietly to their homes. It is estimated that between 12,000 and 14,000 burghers took this oath between March and June 1900.
On 15 March 1939, in violation of the Munich accord and possibly as a result of the deepening economic crisis requiring additional assets, Hitler ordered the Wehrmacht to invade Prague, and from Prague Castle he proclaimed Bohemia and Moravia a German protectorate.
On 15 March 1973, Nixon implied the US would intervene again militarily if the North launched a full offensive, and Secretary of Defense James Schlesinger re-affirmed this position during his June 1973 confirmation hearings.
In 1977, after extending the state of emergency twice, Indira Gandhi called elections to give the electorate a chance to vindicate her rule. Gandhi may have grossly misjudged her popularity by reading what the heavily censored press wrote about her. Gandhi's Congress party was crushed soundly in the elections. The public realized the statement and motto of the Janata Party alliance. Indira and Sanjay Gandhi both lost their seats, and Congress was cut down to 153 seats (compared with 350 in the previous Lok Sabha), 92 of which were in the South.
On March 15, 1991, the US-led coalition restored to power Sheikh Jaber al-Ahmad al-Sabah, the unelected authoritarian ruler of Kuwait. Kuwaiti democracy advocates had been calling for restoration of Parliament that the Emir had suspended in 1986.
On March 15, WHO issued a heightened global health alert about mysterious pneumonia with a case definition of SARS after cases in Singapore and Canada were also identified. The alert included a rare emergency travel advisory to international travellers, healthcare professionals, and health authorities.
According to an article in The New York Times published on March 15, 2009, Bank of America received an additional $5.2 billion in government bailout money, channeled through American International Group.
On March 15, 2016, Google announced the introduction of Google Analytics 360 Suite, "a set of integrated data and marketing analytics products, designed specifically for the needs of enterprise-class marketers" which can be integrated with BigQuery on the Google Cloud Platform.
In a company public announcement on March 15, 2018, Parker said Trevor Edwards, a top Nike executive who was seen as a potential successor to the chief executive, was relinquishing his position as Nike's brand president and would retire in August.
On 15 March 2019, 51 people were fatally shot and 49 injured in two mosques in Christchurch. In a statement broadcast on television, Ardern offered condolences and stated that the shootings had been carried out by suspects with "extremist views" that have no place in New Zealand, or anywhere else in the world. She also described it as a well-planned terrorist attack.
In March 2019, the perpetrator of the Christchurch mosque shootings in New Zealand used Facebook to stream live footage of the attack as it unfolded. Facebook took 29 minutes to detect the livestreamed video, which was eight minutes longer than it took police to arrest the gunman. About 1.3M copies of the video were blocked from Facebook but 300,000 copies were published and shared.