The group underwent numerous personnel changes between 1951 and 1961.

Prior to their debut, the group underwent a training period of two years.

Someone has to be or the group would undergo spontaneous combustion.

The group underwent several personnel changes and split up in 1986.

From 1948 to 1952, the group underwent several personnel changes.

The last two groups were undergoing essential submarine officer training.

With the new member lineup, the group underwent a change in style.

Both groups underwent a shift in musical style during this period.

During 2006 and 2007 the group underwent numerous small line up changes.

In its short history, the group underwent many changes.