Spiritual circumcision should come after crossing the Jordan. Spiritual circumcision must come before conquering Jericho. Don't let the enemy scare you when you can scare him. Recall the two sets of stones.
Physical circumcision has to do with cutting off the flesh literally.
Of the Abrahamic Covenant. The new generation born in the wilderness were to be circumcised. You don't circumcise your men with the enemy nearby. But God protected them because they stepped out in faith and obeyed in this matter. That God's people identify with Him, both in death and in resurrection.