It’s been over a year now since Russia began its invasion of Ukraine.

Early on the morning of Feb. 24, 2022, Russian President Vladimir Putin made a speech about the pending “special military operation.” A few minutes later, tanks, mobile rocket launchers, supply trucks and other military vehicles with the now-familiar “Z” markings rolled across the border, beginning a war that, at present, shows no signs of stopping.

At the time, conventional wisdom expected the conflict to last only a few weeks, if not days, with the powerful Russian army making quick work of Ukraine. That didn’t happen.

Instead, the world saw something else. It saw a leader refusing to step down and a people rallying behind him. Many thought Volodymyr Zelenskyy would flee to Poland or some other safe haven where he would set up a government in exile. But he had no intention of doing that.

During the darkest days of World War II, when England was on the brink of collapse under the constant aerial bombard...