British OO is a bit different to HO, namely a narrower track in scale to the body as it was difficult to fit the motors in the smaller profile British locomotives while maintaining scale.
It would be interesting to use a model railway as a minature battle board... with a train running through it. I read that the Berlin S-Bahn was used during the Battle of Berlin in 1945 for ambulance trains, resulting in the slightly surreal sight of them running through a battle.
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