Ukraine's allies have only sent it around half the heavy weapons promised, experts said.
Ukraine's counteroffensive has moved slowly, and the country is requesting additional weaponry.
"In general, only slightly more than half of the heavy weapons committed have been delivered.
Christoph Trebesch, the head of the team creating the tracker, said "the gap between promised and delivered military aid is wide."
Experts told Insider's Chris Panella last month that NATO allies' hesitation in giving it more weapons is likely hindering Ukraine's counteroffensive efforts.
Persons:
—, Christoph Trebesch, Bradley IFVs, Valerii, Volodymyr Zelenskyy, Insider's Chris Panella
Organizations:
Service, Kiel Institute, Russian, Shadow, Russia, CNN, NATO
Locations:
Germany, Kiel, Ukraine, United States, Czech Republic, Slovenia, Poland, Slovakia, Russia