Watch out Adolf! George has signed up to do his patriotic duty with the Minor Wallop village Home Guard - and he's ready for you and your goose-steppers! There's only one minor problem - the Minor Wallop Home Guard are busy waging their own private war against the unit based in Major Wallop! When the rival Home Guard units are sent on battle manoeuvres, George launches his own unique style of commando raid against Major Wallop to steal a vital Vickers machine gun. The raid fails and so George and a little evacuee girl named Irene decide to fall back on 'Plan B' - to build their very own tank!