What happened on August 4

Series of failed invasions of Korea by Sui-dynasty China between 598 and 614

The Goguryeo–Sui War were a series of invasions launched by the Sui dynasty of China against Goguryeo, one of the Three Kingdoms of Korea, between AD 598 and AD 614. It resulted in the defeat of the Sui and was one of the pivotal factors in the collapse of the dynasty, which led to its overthrow by the Tang dynasty in AD 618.

1264–67 civil war in England

The Second Barons' War (1264–1267) was a civil war in England between the forces of barons led by Simon de Montfort against the royalist forces of King Henry III, led initially by the king himself and later by his son, the future King Edward I. The barons sought to force the king to rule with a council of barons, rather than through his favourites. To bolster the initial success of his baronial regime, de Montfort sought to broaden the social foundations of parliament by extending the franchise to the commons for the first time.

1296–1328 war between England and Scotland

The First War of Scottish Independence was the first of a series of different wars between the Kingdom of England and the Kingdom of Scotland. It lasted from the English invasion of Scotland in 1296 until the de jure restoration of Scottish independence with the Treaty of Edinburgh–Northampton in 1328. De facto independence was established in 1314 AD following an English defeat at the Battle of Bannockburn.

1578 battle in Morocco

The Battle of Alcácer Quibir was fought in northern Morocco, near the town of Ksar-el-Kebir and Larache, on 4 August 1578.

French Benedictine monk (1638–1715)

Dom Pierre Pérignon, was a French Benedictine monk who made important contributions to the production and quality of Champagne wine in an era when the region's wines were predominantly still red. Popular tales frequently, but erroneously, credit him with the invention of sparkling Champagne, which did not become the dominant style of Champagne until the mid-19th century.