Short answers, pulled from the story.
The Crimean offensive ran from the 8th of April to the 12th of May 1944. It began with an assault across the Perekop Isthmus and ended when the last Axis pockets of resistance in the Crimea were destroyed.
Operation 60,000 was the code name for the Axis naval evacuation of the Crimea in April-May 1944. The name referred to the estimated number of Romanian soldiers on the peninsula, though the actual figure was between 62,000 and 65,000. It was the most complex and extensive operation conducted by the Romanian Navy during the Second World War.
German and Romanian convoys evacuated over 113,000 Axis troops in total. The detailed count recorded between the 14th of April and the 13th of May 1944 shows 120,853 people and 22,548 tons of cargo transported by sea, including 58,486 Germans, 36,557 Romanians, 723 Slovaks, 15,391 Soviet volunteers, 2,581 prisoners of war, and 7,115 civilians.
Total Axis losses reached 96,700: 57,500 killed and missing, and 39,200 wounded. German losses alone were 65,100, while Romanian losses were 31,600. Many of the dead drowned during the sea evacuation; the sinking of the Totila and Teja on the 10th of May alone caused up to 10,000 deaths.
German commanders argued that losing the Crimea would negatively affect Turkey's attitude toward the war and put Romanian oilfields within range of Soviet air attacks. The 17th Army was supplied via the Black Sea even after the Red Army severed its land connection through the Perekop Isthmus in November 1943.
Erwin Jaenecke, commander of the 17th Army, had urged Hitler at Berchtesgaden to evacuate Sevastopol and withdraw his army of 235,000 men. After the Crimea fell, he was held responsible, arrested in Romania, and court-martialed. Only the intervention of Heinz Guderian saved his life; he was dismissed from the army on the 31st of January 1945.