Participants dance during the Cadet Ball at the Victory Museum in Moscow, Russia, Oct. 13, 2019. The annual Cadet Ball took place on sunday in Moscow. More than 200 pupils from Moscow's cadet schools participated in the ball. (Photo by Maxim Chernavsky/Xinhua)

Participants dance during the Cadet Ball at the Victory Museum in Moscow, Russia, Oct. 13, 2019. The annual Cadet Ball took place on sunday in Moscow. More than 200 pupils from Moscow's cadet schools participated in the ball. (Photo by Maxim Chernavsky/Xinhua)

Participants dance during the Cadet Ball at the Victory Museum in Moscow, Russia, Oct. 13, 2019. The annual Cadet Ball took place on sunday in Moscow. More than 200 pupils from Moscow's cadet schools participated in the ball. (Photo by Maxim Chernavsky/Xinhua)

Participants dance during the Cadet Ball at the Victory Museum in Moscow, Russia, Oct. 13, 2019. The annual Cadet Ball took place on sunday in Moscow. More than 200 pupils from Moscow's cadet schools participated in the ball. (Photo by Maxim Chernavsky/Xinhua)

Participants dance during the Cadet Ball at the Victory Museum in Moscow, Russia, Oct. 13, 2019. The annual Cadet Ball took place on sunday in Moscow. More than 200 pupils from Moscow's cadet schools participated in the ball. (Photo by Maxim Chernavsky/Xinhua)

Participants dance during the Cadet Ball at the Victory Museum in Moscow, Russia, Oct. 13, 2019. The annual Cadet Ball took place on sunday in Moscow. More than 200 pupils from Moscow's cadet schools participated in the ball. (Photo by Maxim Chernavsky/Xinhua)

Participants are seen during the Cadet Ball at the Victory Museum in Moscow, Russia, Oct. 13, 2019. The annual Cadet Ball took place on sunday in Moscow. More than 200 pupils from Moscow's cadet schools participated in the ball. (Photo by Maxim Chernavsky/Xinhua)