'Overthrow' in the Bible

Then all the assembly made a covenant in the house of God with the king [that is, with the child Joash, to overthrow Athaliah by proclaiming his sovereignty]. And Jehoiada [the priest] said to them, “Behold, the king’s son [Joash] shall reign, as the Lord has said in regard to the sons of David.

But if you do go, strengthen yourself for war. Do you think God will throw you down before the enemy, since God has the power both to help or to overthrow?"