Why is it ironic that Bologna was a "milk run" according to chapter 14?

The beach is yet another superficial paradise in the book, much like the hospital and the apartments. There is a false sense of peace at the beach. Although it appears to be a haven, it turns out to be the sight of a disturbing scene for Yossarian, the presence of the bomb squad. Yossarian incorrectly assumes that death is awaiting him already. Actually, his timing is off since the mission is only a milk run. Still, his terrible premonition about death will come when he least expects it, when McWatt accidentally slices Kid Sampson in half with his airplane. In peacetime, a beach is a place of paradise, but not in wartime.