A leavening agent is an organism or substance that when added to a dough[?] of flour and water causes it to "rise" by evolving carbon dioxide or other gasses that become trapped as bubbles[?] within the dough.
... three-men teams (codename Jedburgh) - one French, one US or British and one radioman – to organize sabotage before the D-day. There were about 87 Jedburgh teams.
SOE ...