They enjoyed a golden age in the Tang dynasty. I hope this helps! : )
On October 2, 1835, rebellious Texans took shots at Mexican soldiers in the town of Gonzales. It was barely a skirmish, as the Mexicans left the battlefield without attempting to engage the Texans, but nevertheless "the Battle of Gonzales" is considered the first engagement of what would become Texas' War of Independence from Mexico. The battle, however, was only the start of the actual fighting: tensions had been high for years between the Americans who had come to settle Texas and the Mexican authorities. Texas formally declared independence in March of 1836: there were many reasons why they did so.
Generally speaking, during the Industrial Revolution, the workers that supplied labor in factories and mines were known as the "urban working class", since most of the factory work was done in or around city centers.
