Ukrainian forces reportedly launched a massive push against Russia's front-lines in the country's southeastern Zaporizhzhia region, threatening Russian positions that had been overseen by a general who was recently fired. The surge marks a dramatic change in pace for Ukraine's ongoing counteroffensive. For nearly two months, Kyiv's troops were forced to make slow and steady advances to liberate occupied territory as they faced Russia's formidable defensive lines, which include deadly networks of trenches, barbed wire, anti-armor obstacles, and minefields. Clearing the Russian fortifications — particularly the minefields — has been a painstaking process for Ukraine, which managed to preserve lots...