John Paton was a missionary in the New Hebrides Islands Vanuatu. One night hostile natives surrounded the mission station, intent on burning out the Patons and killing them. Paton and his wife prayed during that terror-filled night that God would deliver them. When daylight came they were amazed to see their attackers leave.
A year later, the chief of the tribe was converted to Christ. Remembering what had happened, Paton asked the chief what had kept him from burning down the house and killing them. The chief replied in surprise, "Who were all those men with you there?". Paton knew no men were present--but the chief said he was afraid to attack because he had seen hundreds of big men in shining garments with drawn swords circling the mission station.
We often forget as Christians that we also live in a spiritual world of angels and demons. (2Corth.10:2-3)