I did, but I forgot so sorry for some reason. :'(
Search-and-destroy missions in Vietnam were largely unsuccessful. This is because new and larger reinforcements of Viet-Kongs moved in as soon as American forces departed. As such, these missions did not stem the flow of refugees.
Answer:
How could we not, when Maniac Magee finally ends with Maniac simply content that "finally, truly, at long last, someone was calling him home" (46.27). After the miles and miles Maniac's seen-better-days sneakers chewed up, the book ends with him heading home to the place he's been looking for this whole time.
The answer is D-Day
Hope this helps!