Trudeau made the announcement Tuesday in Riga following a meeting with Latvian Prime Minister Maris Kucinskis.
But while Canada's role in the Latvian mission is positive, it is a relatively small one compared to ongoing North Atlantic Treaty Organisation missions in Afghanistan and Kosovo - two operations that are highlighted in annual reports from North Atlantic Treaty Organisation secretary general Jans Stoltenberg, said David Perry, a senior defence analyst with the Canadian Global Affairs Institute.
"My task is to make sure that we stay together, so if I started to freely reflect on all possibilities, then I would undermine the unity of this alliance", Mr. Stoltenberg said.
The summit wraps up Thursday after one more day of meetings.
The Canadian troops will be deployed in the Baghdad region starting in the fall of 2018 to help "Iraq build a more effective national security structure and improve training for Iraqi security forces", said a government statement on Wednesday.
Later this morning, Trudeau will head to the new NATO headquarters, where he will be welcomed by NATO Secretary General Jens Stoltenberg before joining his fellow leaders for a pre-summit group photo before the formal opening ceremonies, which get underway this afternoon. Canada will also contribute up to four Griffon helicopters, the release said.
He said this to journalists after a meeting of the participating countries. The likelihood of a trade war between the USA and Canada appears to be on the rise and both sides are mulling more trade barriers.
"We are two countries that are more closely integrated on trade and security on people-to-people ties than any two countries in the world".
His message, of course, is that in Canada's case, the answer is yes.
"We're at a time where the challenges on our global stage - to democracies, to the principles, to the values, to the rule of law that has kept Europe and much of the world at peace for the last 75 years - is now under a certain amount of strain and stress", Trudeau told the military gathering.
In another show of resolve to Russian Federation, the leaders rubber-stamped a plan to ready a crisis response contingent that can be rapidly deployed 30 battalions, 30 air squadrons and 30 battleships within 30 days. Canada is stepping up.
However the figures were later disputed, with one expert telling CNN the figure was more like 37%, growing to 40% in the next few years - and suggesting that Trump was angling for Germany to buy the United States' more expensive gas. An earlier version said defence spending in Canada as a percentage of GDP was higher in 2018 than in 2017.