These are the first microfilmed v-mails received (see the 1944-09-16 posting for an explanation of v-mail). This suggests Bill is in a combat zone, and based on the date and his troop assignment, that would be Leyte.
After asking his parents not to worry about his new assignment, he says there is little to write about as his troop have seen no action and they move around a lot. He talks about trading with the Filipinos.