Liberal Leader Justin Trudeau announced Friday that his party will not support a motion from Prime Minister Stephen Harper to authorize airstrikes, for up to six months, against the Islamic State of Iraq and the Levant.

Read the full transcript of Trudeau's speech in the House of Commons below:

With this motion, the Prime Minister has finally said in Canada what he said in New York City more than a week ago. He is intent on taking Canada to war in Iraq.

ISIL is a threat both to the region and to global security.

ISIL murders ethnic and religious minorities across Iraq and Syria.

They murder innocent civilians, humanitarian workers, and journalists.

These awful acts have been fully documented – often by the perpetrators themselves.

This is why the Liberal Party supported a 30-day, non-combat role on good faith and on which we were briefed.

This time, instead of briefings, there has only been overheated rhetoric.

Liberals will take the following core principles into the debate next week.

One: That Canada does have a role to play to confront humanitarian crises and security threats in the world.

Two: That when a government considers deploying our men and women in uniform, there must be a clear mission overall and a clear role for Canada within that mission.

Three: That the case for deploying our Forces must be made openly and transparently, based on clear and reliable, dispassionately presented facts.

And four: That Canada’s role must reflect the broad scope of Canadian capabilities. And how best we can help.

Unlike the Prime Minister, Liberals believe Canada can make a more helpful contribution to the international effort to combat ISIL than aging war planes.

I think Canadians have a lot more to offer than that. We can be resourceful, and there are significant, substantial, non-combat roles that Canada can play.

And some we can play better than many – or perhaps any — of our allies.

Whether they are strategic airlift, training, or medical support.

We have the capabilities to meaningfully assist – in a non-combat role – a well-defined international mission.

The fact remains: the Prime Minister has not been upfront with Canadians about his plans.

The Prime Minister and the government have given us no reason to believe that once in combat they will be able to limit our role.

Their overheated and moralistic rhetoric is being used to justify more than just air strikes.

It is an attempt to justify a war.

For Canadians it’s all too familiar, particularly from this Prime Minister.

The 2003 Iraq war was waged on false pretenses and flawed intelligence.

It was a mission that destabilized the region, sowed further conflict, cost our allies three trillion dollars, and cost thousands of people their lives.

The world is still dealing with the consequences of that mistake.

Let us never forget how that mission was sold to the public.

Back in 2003, this prime minister called President Bush’s Iraq war a matter of “freedom, democracy and civilization itself.”

We know the Iraq fiasco haunts the choices we have to make today. But we cannot make the wrong decision now because the wrong decision was made then.

Canada has asked a lot of our men and women in uniform over the last decade. And too often they have returned home only to be let down.

If we are to ask more of them now, our deliberations in this house should be honest and forthright to show ourselves worthy of the valour and strength we know our Forces always show in the field.

We owe them that.

We think there is a role for Canada to be involved in the fight against ISIL.

But there is a clear line between non-combat and combat.

It is much easier to cross that line than to cross back.

It always is easier to get into a war than to get out of one.

The Prime Minister has a sacred responsibility to be honest and truthful with people, especially about matters of life and death. At the end of every decision to enter combat is a brave Canadian in harm’s way. We owe them clarity. We owe them a plan.

Most of all, we owe them the truth.

The Prime Minister has offered none of those.

The Liberal Party of Canada cannot and will not support this Prime Minister’s motion to go to war in Iraq.