Крымский фронт
Kozlov's four major offensives from 27 February through 11 April were all defeated by Manstein's 11th Army with heavy Soviet losses. From 1 January to 30 April, Kozlov's Crimean Front, including the forces at Sevastopol, lost 352,000 men of which 236,370 were lost from February through April in the Parpach Narrows fighting. The Front's losses were the second-heaviest of any Soviet Front during the period. The offensives cost the Crimean Front 40% of its manpower, 52% of its tanks and 25% of its artillery. Axis 11th Army casualties from January to April 1942 were far fewer at 24,120 men. The result was an unbalanced loss ratio of 14–1. Insufficient artillery and air support and ignorance of the German defenses were singled out by Soviet critics as the causes of the failure. The Crimean Front had been all but destroyed as a combat-effective formation and would be completely routed from the peninsula in May. For four months, Manstein had conducted a successful defense on two fronts at once. The spring thaw arrived in early May, and both sides prepared for the battle that would decide the campaign.