What happened on that day in 1986?
1985 Members of the Revolutionary Party of Central American Workers, dressed as Salvadoran soldiers, attack the Zona Rosa area of San Salvador.
This must be it:
https://revcom.us/a/1204/dayofhero.htm
Peruvian revolutionary prisoners fought back against a vicious land, sea, and air assault by the U.S.-backed Peruvian government. Over 300 revolutionary prisoners lost their lives in heroic resistance at the El Frontón, Lurigancho and Santa Barbara prisons.