Historical eventMarch 91847

Mexican–American War

Mexican–American War: The Siege of Veracruz began, the first large-scale amphibious assault conducted by United States military forces.

Everything on March 9Original source

In context

When
Tuesday, March 9 1847179 years ago
Category
Historical eventA dated happening — a battle, treaty, launch, discovery, disaster or decision — recorded on this calendar day.
Era
19th century · 1840s
Recorded from
Wikipedia “On this day” feed

Russia, Greece and some other countries used the Julian calendar into the early 20th century, so local records may show a date up to 13 days earlier.

At a glance

Dates: From 1847.

What happened

Mexican–American War: The Siege of Veracruz began, the first large-scale amphibious assault conducted by United States military forces.

March 9 through the years

Other entries on the same calendar day, in order.

  1. 1847Mexican–American War
  2. 1977Washington, D.C.
  3. 1978Suharto
  4. 1987Chrysler
  5. 1997Comet Hale–Bopp
  6. 2000Nupedia
  7. 2011Space Shuttle Discovery
  8. 20122012–2014 Salvadoran gang truce
  9. 2015Eurocopter AS350 Écureuil
  10. 2020Giuseppe Conte
  11. 20232023 Hamburg shooting

Also in 1847

  • January 13Treaty of CahuengaThe Treaty of Cahuenga was signed, informally ending the fighting of the Mexican–American War in California.
  • July 24Brigham YoungBrigham Young led the first group of Mormon pioneers into the Salt Lake Valley of Utah, at the time a part of Mexico.
  • July 121847 Woodstock riotUp to ten people died in a riot between Catholics and members of the Orange Order in Woodstock, New Brunswick.
  • February 23Mexican–American WarMexican–American War: The United States Army used artillery to repulse the much larger Mexican army at the Battle of Buena Vista near Sal…
  • April 5Birkenhead ParkBirkenhead Park, generally acknowledged as the world's first publicly funded civic park, opened in Birkenhead, England.
  • June 11Afonso, Prince Imperial of BrazilPrince Afonso died at the age of two, leaving his father Pedro II, the last emperor of Brazil, without a male heir.

Everything we record for 1847 →

Sources

Cite this page

“Mexican–American War”, What's On This Date, https://whatsonthisdate.com/app/event/mexican-american-war-1847-march-9, accessed October 24, 2026.

Cite the underlying source as well — the source links above go to the record this entry is adapted from.

Questions about this entry

When did Mexican–American War happen?

March 9 1847 — 179 years ago, on a Tuesday.

Where does this text come from?

Wikipedia “On this day” feed. Summaries are short adaptations that link back to the source, not reprints.

How do I cite this page?

Use the ready-made citation near the sources at the bottom of the page, and follow the source link to cite the underlying record as well.

Text adapted from Wikipedia under CC BY-SA 4.0 and from Wikidata (CC0). Images come from Wikimedia Commons; credit and licence are shown with each image. Editorial entries are © What's On This Date. Sources & licensing · How this site works.