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The latest front is just across Ukraine's northern border, where Ukrainian troops carried out a surprise invasion into Russian territory on Aug. 6, and are solidifying their positions two weeks after that breakthrough.
In eastern Ukraine, Russian forces are making steady advances and are closing in on a town that's crucial for Ukraine's military supply lines.
And in the south, in the Black Sea, Ukraine has delivered an ongoing series of powerful blows to the Russian navy and carved out a channel that allows it to export its wheat and other agricultural products.