When did people start wearing suits?

>>3055496
The first recognizable ancestor of a suit was the Babylonian بدلة which was widely worn by the merchant class.

In the Napoleonic era, the mass mobilisation of the population in the Grande Armée left it's imprint on the population. Employers demanded the standardization and professionalism that army costume inspired from all of their employees. This gradually morphed into the modern day suit.