(Reuters) -More than 1,000 Starbucks unionized baristas launched an open-ended strike on Thursday, intensifying their push for a collective bargaining agreement over pay and other benefits at the coffee giant.

Starbucks Workers United has repeatedly targeted the company’s Red Cup Day – one of its busiest days – when customers receive free reusable holiday-themed cups with coffee purchases.

Here is a timeline of the key moments in Starbucks’ negotiations with its union:

December 2021:

Starbucks workers in Buffalo, New York, voted to unionize, forming the chain’s first U.S. unionized store with Workers United.

May 2022:

Over 50 Starbucks cafes voted to unionize and former U.S. President Joe Biden met with organizers from Starbucks and Amazon.

November 2022:

Workers at more than 100 U

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