A dayslong holiday strike against Starbucks ended on Tuesday with the largest work stoppage ever carried out by the company's unionized workers, involving strikes at more than 300 stores in dozens of cities nationwide, the union Starbucks Workers United said.

A Starbucks barista strike is expanding to some 5,000 workers at what organizers said was more than 300 stores in 45 states, just as the company's busy holiday stretch begins. Though it still only represents approximately 3% of all U.

Starbucks workers have expanded their strike to more cities and closed 59 stores across the U.S. as of Monday, the union said amid stalled negotiations.