On 27 July 1192, Saladin's army began the battle of Jaffa, capturing the city. Richard's forces stormed Jaffa from the sea and the Muslims were driven from the city. Attempts to retake Jaffa failed and Saladin was forced to retreat.

Osman extended the control of his principality by conquering Byzantine towns along the Sakarya River. A Byzantine defeat at the Battle of Bapheus in 1302 contributed to Osman's rise as well. It is not well understood how the early Ottomans came to dominate their neighbors, due to the lack of sources surviving from this period.

The Annapolis riot of 1919 took place on June 27, 1919, between midnight and 1 AM, in Annapolis, Maryland. A mob of African-American bluejackets from the U.S. Navy fought local Annapolis African-Americans.

Longstanding racial tensions between whites and blacks exploded in five days of violence that started on July 27, 1919. On that hot summer day, on a segregated Chicago beach, a group of white men stoned Eugene Williams to death when he crossed the unofficial barrier between the white and black sections of the 29th Street beach. Tensions escalated when a white police officer not only failed to arrest the white man responsible for Williams' death, but arrested a black man instead. Objections by black observers were met with violence by whites. Attacks between white and black mobs erupted swiftly. Because of the rioting, 38 people died (23 African American and 15 white), and another 537 were injured, two-thirds of them African American; one African-American Patrolman John W. Simpson was the only policeman killed in the riot.

After repelling the Hungarian attack, the Romanian army prepared to cross the Tisza River. From 27–29 July, the Romanian Army tested the strength of the Hungarian defense with small attacks. A plan was made to cross the Tisza River near Fegyvernek, where it makes a turn.