TORONTO - Canada's Parliament has voted to authorize airstrikes against the Islamic State of Iraq and Syria militant group in Iraq following a U.S. request.

Prime Minister Stephen Harper's Conservative Party introduced the motion last week and it was debated this week. Harper has a majority of seats in Parliament so the vote was all but assured. The motion passed 157-134 Tuesday.

The motion authorizes air strikes in Iraq for up to six months and explicitly states that no ground troops be used in combat operations.

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The combat mission includes up to six CF-18 fighter jets, a refueling tanker aircraft, two surveillance planes and one airlift aircraft. About 600 airmen and airwomen will be involved.

Canada is among dozens of countries that have joined the U.S.-led coalition fighting the Islamic State of Iraq and Syria, including several Arab states.

"Canada will do our part," Conservative cabinet minister Lisa Raitt tweeted after the vote.

Canada has more than two dozen special forces advisers already in Iraq and has plans for up to 69 advisers as part of an effort to advise Kurdish forces against Islamic militants after a request from President Barack Obama. The U.S. followed that up with another request for an air combat role.

Although the mission didn't need parliamentary approval, the government submitted it to a vote to show consensus.

Harper's government won the support of the opposition parties for air strikes in Libya in 2011 but not for this mission. Opposition New Democrat leader Thomas Mulcair said the Conservatives are plunging Canada into a prolonged war without a credible plan to help victims of Islamic State terror.

Canada's former Liberal government refused a request to send troops when the U.S. invaded Iraq in 2003, straining ties between the two neighbors. Canada then stepped up its Afghanistan mission.

Harper formally ended Canada's combat role in Afghanistan in 2011. The mission cost 157 soldiers their lives since 2002, shocking Canadians unaccustomed to seeing their troops die in battle.