However , as strike action declined in 1921 and beyond so too did the influence of the Sindicatos Libres as their violent activity became of less value to the employers .
They reached 150,000 members in the 1920 -- 21 period .
As strike action declined in 1921 and beyond so too did the influence of the Sindicatos Libres as their violent activity became of less value to the employers .
They reached 150,000 members in the 1920 -- 21 period .