"war balloons" . "first military use" . "Royal Engineers Balloon Section" . "Balloon Companies" . . "RE Balloon Section" . "military balloons" . "combat balloon" . . "balloon" . "used for aerial reconnaissance" . "Balloon Corps" . "History of military ballooning" . "used in" . . "History of military ballooning" . . "balloons" . "first three observation balloons ever used" . "military ballooning" .