Answers: During the American civil war the league army tried lofting an observer within a tethered hot air balloon to monitor opponent troop dispositions and report back to the commander on the ground. This be the first Balloon Signal Service.
This web site may abet! I've never heard of the "Ballon Signal Service".
http://en.wikipedia.org/wiki/United_Stat...
More Auto Questions and Answers...
This article contents is post by this website user, AutoQnA.com doesn't promise its accuracy.