January 1, 1857
Mountain Meadows massacre — 1857 massacre of California-bound emigrants by Mormon militiamen
1857–58 uprising against British Company rule
Conflict between Ecuador and Peru between 1857 and 1860
Maritime treaty regarding Danish straits
1857 major battle of the Anglo-Persian War
Battle of Second Opium War (25–27 May 1857)
Battle during Indian Rebellion of 1857
New York City Police Riot
1857 Indian War skirmish