After months of stalled negotiations, 10,000 Air Canada flight attendants walked off the job early Saturday morning. The federal government stepped in hours later to order binding arbitration, forcing an end to the strike — or so they thought.

The union representing Air Canada flight attendants said Sunday it would defy the back-to-work order and remain on strike.

Here's everything you need to know:

1. Government intervention

The federal government used a contentious section of labour law to intervene and stop the strike, which began at 12:58 a.m. ET Saturday.

Jobs Minister Patty Hajdu invoked Section 107 of the Canada Labour Code, which gives the minister the power to order the end of a work stoppage to "maintain or secure industrial peace."

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