The term manufacture is not entirely accurate, insofar as beer was not "invented" but rather conceived by chance.

Sumerian inscriptions (in Mesopotamia, now Iraq) prove its origin in 6000 BC. The Akkadian language names the first beer with the name sikaru, meaning liquid bread.

The Sumerians used to produce bread and cakes from barley. As they were then stored, these were very hard. It was therefore necessary to soften them by soaking them in water. One day, a Sumerian forgot to remove his dry bread. Under the combined action of natural yeasts and fermentation, it was then transformed into beer, the very first in the world.

This term and this invention were then exported to other countries around the world.

You know the birth of beers. Also learn how beer was called in the middle ages !