What a BS lying and misleading headline. Let’s read the actual article:

“Belarus, a small Russian ally bordering Ukraine, has as many as 1.5 million potential military personnel outside its armed forces, a senior official was quoted as saying on Saturday.”

"The structures of the organisations, not the Armed Forces, will amount to somewhere up to 1.5 million people in the event of a declaration of martial law and the switch of the economy to a war mode”