The Soviet 139th Rifle Division – 20,000 troops supported by 147 artillery pieces and 45 tanks – crossed the border on all available roads leading to Tolvajarvi, a key road junction defended by 4,200 scattered Finnish reservists. Cavalry Reserve Lt. Toivianen was celebrating his forty-fifth birthday that grim morning in Artahuhta, near the border post of Myllyjarvi. His men had gathered to congratulate him and present him with a new fountain pen. He had just made his acceptance speech when the sound of heavy artillery echoed from the direction of the border. Mounting immediately, Toivianen and his squadron galloped to join the fifteen border guards defending the post.