It reminds me of an old Asian tale. About a Samurai who solemnly (but underhandedly forced) swore to protect the walls of China. And when the war was over he was offered a place back home, having served his purpose. But the end is much sadder, he lies next to the walls and sleeps for the last time. A great dragon god had been watching the entire time an turns his body into a Golem. So that he may ever fulfill his duty.