Military mathematics

Russian Defense Minister Sergei Ivanov said, speaking to deputies of the State Duma, that there is nowhere else to reduce the Russian army. Today the size of the army is 1 million 100 thousand people. “We believe that at present the number is optimal and sufficient for effective defense ...,” Ivanov said. Simply put: you will not see the abolition of conscription, since this is a state necessity. But where do these “necessities” come from? What data does the minister rely on, what tasks are these forces needed for, etc. How do they think?