The Biden administration sometimes refers to the need to build a “bridge” to NATO membership for Ukraine. It’s an apt metaphor—just not in the way its proponents might think.
One might think of a bridge as a mere symbol of hope. But, invoked in a military context, a bridge is best understood in its role as wartime infrastructure. And that metaphor works precisely because building a bridge in wartime is an incredibly difficult and complex operation—one that military planners call a “wet gap crossing.” Conducting a contested wet gap crossing is perilous—see Ukraine’s evisceration of a Russian battalion attempting to cross the Siverskyi Donets River in May 2022—but the possible strategic rewards are high. In 1944, George S. Patton’s Third Army crossed the Moselle River at Nancy, turning the German defensive line and opening a strategic position for the Battle of the Bulge.
Much like a wet gap crossing, bringing Ukraine into NATO would be risky and costly, but
