Bаsed оn the twо mаjоr supporting detаils, can you predict the topic? 1) In 1794, a group of shoemakers met in Philadelphia and formed the first known craft union in the United States. A craft union is made up of skilled workers in a single craft or profession. 2) In the 1930s the second type of American labor union emerged—the industrial union, comprised of skilled and unskilled workers from all sectors of a particular industry. The first industrial unions were in auto and steel manufacturing.