Rather, it brought back 'wide open' gambling. 98, which Governor Fred Balzar signed into law on this day, didn't 'legalize gambling' in Nevada. March 19, 1931: Commercial Gambling (Re) legalized The five dates discussed below are significant milestones that show how Las Vegas developed its dominance-and how it is hoping to retain it in the future. About 80 percent of that revenue comes from Las Vegas. Today, Nevada's gaming industry is a juggernaut the largest in the United States and second largest in the world, with annual casino revenues of more than $11 billion.
