A fence was put up, they were told, to protect them from the advancing evil army. They were told that the fence was to keep the enemy out, but the enemy was the one who put up the fence ...to keep them in.

    A fence was put up, they were told, to protect them from the advancing evil army.  They were told that the fence was to keep the enemy out, but the enemy was the one who put up the fence ...to keep them in.  Many of them couldn't get to their jobs, but they were told they'd soon have jobs.  Finally, after befriending them, they were told to get on the train to avoid the quickly advancing army.