With the United States expected to send a new longer-range weapon to Ukraine, it has answered Ukrainian President Volodymyr Zelenskyy's plea for rockets that can strike deep behind the front lines of the nearly yearlong conflict with Russia.

Now Russian forces will need to adapt or face potentially catastrophic losses.

The new weapon, the Ground Launched Small Diameter Bomb (GLSDB), will allow Ukraine's military to hit targets at twice the distance reachable by the rockets it now fires from the U.S.-supplied High Mobility Artillery Rocket System (HIMARS). If included as expected in an upcoming weapons-aid package, the 151-kilometer GLSDB will put all of Russia's supply lines in the east of the country within reach, as well as part of Russian-occupied Crimea.