Brigadier General Oleksandr Tarnavskyy, commander of the Tavriya operational and strategic group of troops, has told CNN that Ukraine has already received cluster munitions from the United States.
"We just got them, we haven't used them yet, but they can radically change [the battlefield]," he said.
Senior leadership will decide on the "areas of territory where it can be used", Tarnavskyy said, noting that "this is a very powerful weapon".
"The enemy also understands that with getting this ammunition, we will have an advantage. The enemy will give up that part of the terrain where it is possible to use this," he added.
He emphasized the restrictions on the use of clusters, saying their use is prohibited in heavily populated areas, even if occupied by Russian forces. The US has said they have written assurances from Ukraine that they will not be used in areas with civilians and that their use will be tracked for eventual de-mining operations.
"The Russians think that we will use it on all areas of the front," he added. "This is very wrong. But they are very worried."