The 32 NATO allies will celebrate, from July 9 to 11, the 75th anniversary of the alliance in the same city where the initial treaty was signed.
According to Canadian media reports, Trudeau is likely to face pressure from the group due to the fact that Canada has not presented a plan to meet its spending goals.
NATO countries have agreed to spend at least two percent of their annual gross domestic product on defense, but Canada falls far short of that figure.
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