Army Secretary Dan Driscoll and chief of staff Gen. Randy George became the highest-level Trump Pentagon officials to visit Ukraine when they arrived on an unannounced trip this week, as the U.S. moves to find a way to speed the end of the war.

Axar.az informs, citing Politico, the duo are slated to meet with Ukrainian military leaders, lawmakers and President Volodymyr Zelensky, starting Wednesday. The tour comes at a time when Russia has stepped up its deadly missile and drone campaign against civilian targets in Ukraine and western allies are scrambling to come up with new ways to keep supplying weapons to the embattled nation.

The focus of the trip will be to engage Ukrainian leadership on the stalled peace process with Russia, even though Moscow has rebuffed all previous attempts by the U.S. and Ukraine to bring the fighting to a halt.

The U.S. and Ukraine have also been working on a major deal to exchange drone and autonomous munitions technologies, and this trip in part is meant to bolster that effort. Ukraine has emerged as a leader in developing — and improving — long- and short-range armed drones that have changed the face of the battlefield and struck targets deep inside Russia.