CALDERDALE council workers are to be asked whether they might take action over spending cuts and changes to redundancy pay.
The "indicative ballot" will involve members of 10 separate unions and could pave the way for a strike ballot.
More than 500 workers attended a mass meeting yesterday lunch-time which organisers described as an incredible turnout.
They heard how councillors have recommended reducing the amount staff made redundant can be paid from 104 weeks to a maximum of 52 weeks - worth 26,000.
The budget drawn up by Liberal Democrat and Labour councillors, which went out to public consultation this week, could result in about 200 job losses.
"On that basis, there is little point changing the redundancy terms," said joint unions' spokeswoman Sue McMahon.