What happened on July 18

Part of the Roman–Etruscan Wars (477 BC)

The Battle of the Cremera was fought between the Roman Republic and the Etruscan city of Veii, in 477 BC.

The Roman–Persian wars, also called the Roman–Iranian wars, took place between the Greco-Roman world and the Iranian world, beginning with the Roman Republic and the Parthian Empire in 54 BC and ending with the Byzantine and the Sasanian empires in 628 AD. While the conflict between the two civilizations did involve direct military engagements, a significant role was played by a plethora of vassal kingdoms and allied nomadic tribes, which served as buffer states or proxies for either side. Despite nearly seven centuries of hostility, the Roman–Persian wars had an entirely inconclusive outcome, as both the Byzantines and the Sasanians were attacked by the Rashidun Caliphate as part of the early Muslim conquests.

Destruction of the Roman city by the Huns (452)

The Sack of Aquileia occurred in 452, and was carried out by the Huns under the leadership of Attila.

Chinese Tang dynasty general (594–669)

Li Shiji, courtesy name Maogong, posthumously known as Duke Zhenwu of Ying, was a Chinese military general and politician who lived in the early Tang dynasty. His original family name was Xú, but he was later given the family name of the Tang imperial clan, Li, by Emperor Gaozu, the Tang dynasty's founding emperor. Later, during the reign of Emperor Gaozong, Li Shiji was known as Li Ji to avoid naming taboo because the personal name of Emperor Gaozong's predecessor, Emperor Taizong, had the same Chinese character "Shi".

1195 battle of Almohads and Castillians

Battle of Alarcos, was fought between the Almohads led by Abu Yusuf Ya'qub al-Mansur and King Alfonso VIII of Castile. It resulted in the defeat of the Castilian forces and their subsequent retreat to Toledo, whereas the Almohads reconquered Trujillo, Montánchez, and Talavera.