After decades of sustained land operations, the U.S. Marine Corps is looking back out to sea, embracing its roots as a naval expeditionary force.

Compared to the rise of air and nuclear power, for example, research into cyber has yet to identify “settled truths.”

The new U.S. aid package will reestablish a critical flow of weapons to Ukraine’s military, but the war will hinge greatly on which side can ramp up and sustain its firepower and troop numbers in the…