Target-panic,
the postcards and notes are great. I was looking through the reports from the China campaign - no mention of our soldier, so he didn't get hurt and he didn't commit any crimes, at least that he got caught for. If he was cav at that time, he **had** to have been in the 6th. There was one officer from the 7th who was an aide-de-camp to Chaffee; no mention of anyone from the 1st.
It was originally planned that the forces would be built up to about 80,000 troops. The First and the Seventh were going to be sent out ... those plans were made when it was thought that the legations had been overrun and everyone wiped out. Then they started getting messages from inside the walls, that the legations were holding out. Plans changed, and they went for broke with what they had.
Our soldier had to be on the ground to get that ribbon. He could have been in the 9th or 14th infantry, the 6th cavalry or the 5th Artillery. If he was Army, that's about it.
jn
PS. Scans of the postcards and photos would help identify the ships and places, transcripts or scans of the mesages would be great, too.