WASHINGTON (AP) — President Joe Biden’s administration is urging Ukraine to quickly increase the size of its military by drafting more troops and revamping its mobilization laws to allow for the conscription of troops as young as 18.

A senior Biden administration official, who spoke on the condition of anonymity to discuss the private consultations, said Wednesday that the outgoing Democratic administration wants Ukraine to lower the mobilization age to 18 from the current age of 25 to help expand the pool of fighting-age men available to help a badly outnumbered Ukraine in its nearly three-year-old war with Russia.

The official said “the pure math” of Ukraine’s situation now is that it needs more troops in the fight.