Bible Verses About Sieges: Frequently helped by allies

And it came to pass, when the morrow was come, that Saul put the people in three companies: and he came into the midst of the camp in the morning watch, and he slew the Ammonites until the day grew hot, and the rest were scattered, so that two of them were not left together.

David, therefore, and his men, went to Ceila, and fought against the Philistines, and brought away their cattle, and made a great slaughter of them: and David saved the inhabitants of Ceila.