Canada will cease airstrikes against Islamic State militants in Iraq and Syria by Feb. 22, Prime Minister Justin Trudeau announced Monday.

The CF-18 fighter jets will be pulled from the mission, but one refuelling plane and two surveillance aircraft will continue to participate. Ottawa will also triple the size of what it calls the 鈥渢rain, advise and assist effort鈥 in the region. Currently, 69 special forces trainers are assisting local troops on the ground.

Canada鈥檚 new contribution to the fight against ISIS will include additional medical personnel and equipment such as small arms and ammunition to assist Iraqi security forces.

"The people terrorized by (ISIS) don't need our vengeance, they need our help,"

Trudeau made the announcement alongside Defence Minister Harjit Sajjan, Foreign Affairs Minister Stephane Dion and International Development Minister Marie-Claude Bibeau.

Asked whether Canadian military trainers will engage in front-line operations or on-the-ground combat alongside local security forces, Trudeau said, 鈥渢his is a non-combat mission.鈥

, Chief of Defence Staff Gen. Jonathan Vance said military trainers will likely face 鈥渆ngagements鈥 with ISIS militants, and called the new strategy "riskier overall."

"In my view, it's a non-combat mission in that we are not the principal combatants here,鈥 Vance said. "I want Canadians to know that we will be involved in engagements as we defend ourselves or those partners who we are working with.鈥

Vance said Canadian military personnel will be marking targets as part of their work with Iraqi security forces.

鈥淭here鈥檚 no mistake about it -- we are in a conflict zone,鈥 Sajjan told CTV鈥檚 Power Play later on Monday. But he said the 鈥渕ost critical鈥 piece of Canada鈥檚 contribution will be 鈥減rofessionalizing鈥 the Iraqi security forces so that they can 鈥渉old the ground鈥 for future stability in the region.

The ongoing mission, known as Operation Impact, will be extended for another two years, with a review scheduled in March, 2017.

Trudeau said the mission will be put to a debate and a vote in the House of Commons next week.

Details of Canada鈥檚 revised ISIS mission came as Sajjan prepares to attend a meeting of NATO defence ministers in Brussels this week.

Peter Cook, a spokesperson for the Pentagon, said later on Monday that the U.S., who is leading the coalition against ISIS, welcomes Canada's new "contributions."

Trudeau has been under pressure to keep the CF-18 fighter jets in the combat mission against ISIS in Iraq and Syria. But he has repeatedly said that he won鈥檛 back down on his election promise.

Trudeau said Monday that 鈥渟ome鈥 people think the government should use 鈥渉eated, over-the-top rhetoric鈥 when talking about ISIS. But he said that would only accomplish 鈥減recisely what our enemies want us to do: they want us to elevate them, to give in to fear, to indulge in hatred."

鈥淲e know Canada is stronger, much stronger, than a threat posed by a group of murderous gang of thugs,鈥 he said.

Trudeau said his decision to pull the CF-18 fighter jets was guided by a 鈥渄esire to do what Canada can do best鈥 to assist affected regions.

鈥淔or us, this is the right approach,鈥 he said.

Increased training efforts are 鈥渧ery much appreciated by the Iraqi government,鈥 he added.

In a statement, interim Conservative Party leader Rona Ambrose called the withdrawal from the combat mission a 鈥渟hameful step backward鈥 for Canada.

鈥淭his was (Trudeau鈥檚) first major foreign policy decision and he ended our combat mission against ISIS 鈥 the greatest threat to humanity,鈥 Ambrose later told CTV鈥檚 Power Play. 鈥淢r. Trudeau doesn鈥檛 think this is our fight and I think he鈥檚 wrong.鈥

Ambrose said that Trudeau 鈥渘ever gave a good reason鈥 for pulling the fighter jets and letting Canada鈥檚 allies 鈥渄o the heavy lifting.鈥

She said she supports the government鈥檚 diplomatic, humanitarian and training efforts, but she also supports 鈥渄egrading and defeating the threat of ISIS.鈥

鈥淎nd that happens with military intervention.鈥

Over the next three years, the government will be spending more than $1.1 billion on the entire mission, including the costs of security, humanitarian and development assistance. The humanitarian mission includes $840 million to provide water, shelter, health care, and sanitation. Another $270 million will be provided to assist countries that are helping refugees from the region.

With files from The Canadian Press