In 1940 when Britain expected Hitler to invade at any moment 'Mad' Mike Calvert and Peter Fleming (brother of the more famous Ian Fleming) were given the job of making Kent and Sussex unsafe for any axis invaders.
They went around destroying or booby-trapping piers, organising 'stay-behind' squads of farm hands and other local men and filling the basements of houses likely to be used as enemy HQs with explosives ready for the Germans to move in.
One of their cunning devices was the exploding milk churn. The idea was that these innocuous items were perfect for booby-trapping and could be left almost anywhere in the countryside without arousing suspicion. Consequently many were prepared, ready for instant deployment should the need arise.
Exploding milk churns in Crossfire.
I bought a dozen 1:50 scale resin milk churns and based them on two pence pieces. I left the 'heads' visible on the underside of six and 'tails' on the rest.
Obviously, in real life, there would have been many milk churns around and only a few would be bombs. I wanted a way of simulating this and the fact that the local Home Guard commander wouldn't actually know where the booby-trapped churns were because they'd have been placed by partizans and not his own men.
The allied player can place a number of milk churns wherever he wants up to the number dictated by the scenario. Half should be 'heads' and half 'tails'. I would suggest the total available should be two for every enemy platoon with a maximum of twelve unless you're planning a really big game.
The milk churns should be placed in terrain features and will affect the whole piece if they explode.
When an enemy unit enters the terrain feature containing a milk churn the allied player 'detonates' it. He must flip a coin and if the result matches the type of milk churn it will explode inflicting a 4D6 attack on the nearest squad with a 2 squad kill potential (these were very big and nasty bombs) Pins are ignored but a suppression or better will allow the Allied player to seize the initiative. If it doesn't detonate it was a dud or a real milk churn and is removed from play.
German Engineers treat the milk churns as mines and if they roll a 3-6 may take an action to 'disarm' one. The disarmed churn is removed from play. On a 1-2 the allied player flips the coin as normal however.