Why doesn't tommo like mud anymore in the book private peaceful?

In the book "Private Peaceful" by Michael Morpurgo, Tommo's dislike for mud stems from his traumatic experiences during World War I. The mud symbolizes the harsh and grim realities of life in the trenches, where it becomes associated with suffering, death, and the loss of innocence. His fond childhood memories of playing in the mud are overshadowed by the horrors he faces as a soldier, leading him to see it as a reminder of the war's brutality.