 Complete the following phrase:  The port was a valuable target. Its importance as a potential naval and air base would enable the Axis to conduct far-ranging sea and air operations against Soviet targets into and over the Caucasus ports and mountains. The Red Air Force had been using the Crimea as a base to attack targets in Romania since the Axis invasion in June 1941, proving its usefulness as an air base. Likewise, the Wehrmacht had launched a bombing raid on the Sevastopol naval base at the start of the 