Thousands of Amazon workers will walk off the job on Thursday morning, in the crucial final days of the holiday season, after union officials said the retailer failed to come to the bargaining table to negotiate contracts.The strike is a challenge to Amazon’s operations as it races to fulfill orders during its busiest season of the year, although union-represented facilities represent only about 1% of Amazon’s hourly workforce.In the New York City area, for example, the company has multiple warehouses and smaller delivery depots.The International Brotherhood of Teamsters said unionized workers at facilities in New York City; Skokie, Illinois; Atlanta, San Francisco and southern California will join the picket line to seek contracts guaranteeing better wages and work conditions.The Teamsters union has said it represents about 10,000 workers at 10 of the company’s US facilities. Workers at seven of those facilities will walk out on Thursday, the Teamsters said.A spokesperson for Amazon said the Teamsters union had for more than a year claimed to represent thousands of Amazon employees and drivers.“They don’t, and this is another attempt to push a false narrative,” said spokesperson Kelly Nantel.“The truth is that the Teamsters have actively threatened, intimidated, and attempted to coerce Amazon employees and third-party drivers to join them, which is illegal and is the subject of multiple pending unfair labor practice charges against the union, Nantel added.Teamsters did not immediately respond to an emailed request for comment.The union had given Amazon a deadline of Sunday to begin negotiations, and workers at facilities voted recently to authorize a strike.Teamsters local unions are also putting up picket lines at hundreds of Amazon Fulfillment Centers nationwide, the union said in a statement on Wednesday.Observers said Amazon is unlikely to come to the table to bargain, calculating it could open the door to ad...