Nearly two million Ukrainians have updated their military registration records since a new mobilisation law came into force on 18 May.
The law mandates that all eligible citizens aged between 18 and 60 update their registration data within 60 days.
The revised legislation aims to simplify the identification of conscripts nationwide in a bid to bolster Ukraine's forces on the battlefield.
Incentives such as cash bonuses and financial aid for housing or a car have been offered to those who join.
Ukrainians can update their information on a dedicated app called Reserve+ or go to an administrative service centre in person.
According to deputy defence minister Kateryna Chernohorenko, 1.5 million citizens have updated their data through the mobile app.
A further 233,000 have reportedly updated their records in person, while 208,000 have done so via military recruitment offices.
The highest number of updates from abroad came from Poland, Germany, the Czech Republic, Canada, and the United States.
