Callup of Yearly classes?

[5th Horseman]

I'm researching when new callups were made to replace losses at the front.

In particular when and how many men were called up for training.

Ironically, considering the subsequent disorder in Russia, I have found exactly what I need for that country.

Can anyone supplement the data below for other countries?

From, The Russian Army in the World War.

Nicholas Golovine, 1931.