There were a number of high ranking officers who surrendered themselves and their commands during WWII to enemy forces prior to the end of the war.

A couple of high profile examples would be Major General Edward P. King and Jonathan M. Wainwright, who surrendered American and Filipino forces to Japanese forces on the Bataan peninsula in April 1942, and Field Marshal Friedrich Paulus, who surrendered German forces in Stalingrad to Soviet forces in January 1943.

In both cases, despite being high ranking general officers, both King and Paulus were kept in captivity throughout the duration of the war (and in Paulus's case, beyond the war as well), though neither were necessarily afforded much luxury or privilege despite their rank. It should be noted that officers were typically kept separate from enlisted men in POW camps. While officers may have received better treatment or some privileges due to their rank, it was not necessarily the norm, and was highly dependent on both who their captors were as well as the circumstances surrounding their surrender.

For example, Paulus refused to cooperate with his captors immediately following his surrender, but he was still treated far better than the average junior officer or enlisted man captured by the Soviets (primarily due to the propaganda value the Soviets saw in him), but was still subject to harsher conditions than one could expect if they had been captured by a Western Allied nation. On the other hand, Gen. King and Gen. Wainwright were both treated quite harshly by the Japanese after their surrender.