The 300,000 reservists being called up by Russia are "not trained, not experienced and not ready" and it could be an "extremely dangerous" move, a military analyst has told Sky News.
Retired Air Vice-Marshal Sean Bell said the size of the call-up may sound impressive but that those being mobilised were not active, battle-hardened soldiers.
"Because of conscription you serve in the military [in Russia] for a short time," he said.
"They've actually got something like two million reservists who've served in the military in the last five years. If you extrapolate, it's something like 25 million reservists that have at some stage served in the military.
"The challenge with all these numbers is that they look very grand.
"In context, 300,000 sounds a big number but these people are not trained, they're not experienced, they're not ready, and this is an incredibly hostile environment.