About 3,200 union members at Boeing facilities in Missouri and Illinois went on strike at midnight on Monday after rejecting an offer from the company, the union said.

More than 3,000 Boeing machinists entered their third day of a strike on Wednesday. The workers, who make fighter jets and weapons systems at facilities in Illinois and Missouri, are organizing for better pay, benefits and scheduling. The walk-out comes in what is supposed to be a turnaround year for Boeing .

Boeing union workers who assemble fighter jets strike in two states following rejection of contract offering 20% general wage increase and $5,000 bonus.

Several thousand workers at three Midwest manufacturing plants where Boeing develops military aircraft and weapons went on strike early Monday, potentially complicating the aerospace company's progress in regaining its financial footing.

After rejecting the company's second proposed contract, union members in the St. Louis area began striking Monday. They said they will not stop until they receive a fair deal.