And they said unto Jephthah, come and be our captain
The general of their army, to conduct and lead on their forces; they did not propose him to be their king, being convinced by Abimelech's conduct that such a step would be wrong; nor did they say anything of his being their judge, having no other view than to serve their present exigence; besides, a judge was not one chosen by the people, but raised up of God, and which honour was conferred on Jephthah afterwards:
that we may fight with the children of Ammon;
with judgment, courage, and success; they did not make this proposal to him to save themselves from being engaged in the war, but that they might have one skilful in military affairs at the head of them, to instruct them in the art of war, and lead them on in a regular manner, and animate them by his brave example.