T/F: As usual, while "many tightened their belts carefully and hitched at their trousers," the youth began fidgeting with his button.

THis would be true

In this specific place, Henry's button fidgeting doesn't appear to be there so if you mean near this line, I would say False.

"Many tightened their belts carefully and hitched at their trousers. A moment later the officers began to bustle among the men....

"