In the decade following, the rapid growth of the Industrial Workers of the World (IWW, or Wobblies) in un-unionized trades, logging, wheat farming, and lumber camps began extending its efforts to mines, ports and agriculture. The IWW came to public notice after the Wheatland Hop Riot, when a sheriff's posse broke up a protest meeting and four people died. It led to the first legislation protecting field labor. The IWW was harmed by anti-union drives and prosecution of members under the California Criminal Syndicalism Act.