'Camp' in the Bible

On the third day, behold, a man came out of the camp from Saul, with his clothes torn and dust on his head. And it came about when he came to David that he fell to the ground and prostrated himself.

Then David said to him, “From where do you come?” And he said to him, “I have escaped from the camp of Israel.”

Now therefore, gather the rest of the people together and camp against the city and capture it, or I will capture the city myself and it will be named after me.”

So the three mighty men broke through the camp of the Philistines, and drew water from the well of Bethlehem which was by the gate, and took it and brought it to David. Nevertheless he would not drink it, but poured it out to the Lord;