Luke Chapter 1; God intervenes to save mankind from our sin by becoming the unique God-Man of all history. The angel, Gabriel, comes and announces what God is about to do to Zacharias and Mary.
There is a lot in Joshua Chapters 2-6, inculding the Battle of Jericho; Rahab the harlot saves the Israelite spies. God is with Joshua as He was with Moses. Israel takes Jericho as the walls fall down.
God tells Joshua to be Strong and Courageous, 4 times.