1998 Puerto Rican general strike
The Puerto Rican general strike of 1998 began as a strike of Puerto Rico Telephone Company workers to protest a government privatization plan. Three weeks later, an estimated 500,000 people joined a two-day general strike, bringing commerce and travel in Puerto Rico to a standstill.
Source: Wikipedia — 1998 Puerto Rican general strike (CC BY-SA 4.0)