Ukraine claimed it used U.S.-supplied ATACMS missiles to destroy nine Russian helicopters, as well as ammunition, an air defense system and other assets in Russia-occupied regions.
Canada has been a fervent supporter of Ukraine during the war, with Prime Minister Justin Trudeau and Ukrainian President Volodymyr Zelenskyy speaking often.
Zelenskyy's trip comes as Congress is debating Joe Biden's request to provide at least US$21 billion in military and humanitarian aid for Ukraine as it fights the Russian invasion.
The attack highlighted Kyiv's growing missile capabilities as Russia continues to bombard Ukraine from afar with long-range missiles and assault drones.
Ukraine launched a counter offensive in June to reclaim territory seized by Russia, but has struggled to break through entrenched Russian lines and has faced growing criticism.