Billy says that he first came unstuck in time in 1944, long before his trip to Tralfamadore. The Tralfamadorians didn't have anything to do with his coming unstuck. They were simply able to give him insights into what was really going on. (2.11.1)
Billy, after all, had contemplated torture and hideous wounds at the beginning and the end of nearly every day of his childhood. Billy had an extremely gruesome crucifix hanging on the wall of his little bedroom in Ilium. A military surgeon would have admired the clinical fidelity of the artist's rendition of all Christ's wounds – the spear wound, the thorn wounds, the holes that were made by the iron spikes. Billy's Christ died horribly. He was pitiful. (2.19.15)
Weary drew back his right boot, aimed a kick at the spine, at the tube which had so many of Billy's important wires in it. Weary was going to break that tube.
But then Weary saw that he had an audience. Five German soldiers and a police dog on a leash were looking down into the bed of the creek. The soldiers' blue eyes were filled with a bleary civilian curiosity as to why one American would try to murder another one so far from home, and why the victim should laugh. (2.33.6-7)