Thanks to the mobilisation of Russia’s industry for war, and to the call-up of new classes of conscripts, the Russian armies now outnumbered their opponents, by 300,000 to 180,000 in the north and 700,000 to 360,000 in the centre; only in the southern sector, commanded by Brusilov, did numbers remain equal at about half a million men on each side. In the north the Russians for the first time had a large superiority in guns and stocks of shell, with 5,000 guns and a thousand rounds per gun, considerably more than assembled by the Germans for the Gorlice-Tarnow breakthrough.

