The U.S. troops will start training the Ukrainian armed forces on the howitzers in the next several days, U.S. Department of Defense spokesperson John Kirby said during a press briefing on April 18.
"It is true that we believe we'll be able to begin a process of training the Ukrainian armed forces on the howitzers that we'll be shortly heading over," he said.
"That training will occur outside of Ukraine."
At the same time, Kirby refrained from talking about who's going to be doing the training, and exactly on what timeline.
Last week, U.S. President Joe Biden announced $800 million in additional military aid to Ukraine, expanding it with heavy artillery.
Part of that support includes 155 mm howitzer artillery weapons, a different caliber from the 152 mm that Ukrainian troops typically use. The Pentagon estimates it will only take several days to bring Ukrainian soldiers up to speed with the weapon.