The two episodes in the epilogue (Judges 17:1 – 18:31 and Judges 19:1 – 21:25) share some thematic and verbal connections:
Small family apostasy escalates to tribal apostasy (Judges 17:1 – 18:31)
Small family quarrel escalates into national civil war (Judges 19:1 – 21:25)Nameless Levite comes to reside in Ephraim (Judges 17:8)
Nameless Levite an original resident in Ephraim (Judges 19:1):Priests inquire of God
Apostate priest gives false answer (Judges 18:5–6)
True priest gives true answers (Judges 20:27–28)
Conclude referring to Shiloh (Judges 18:31; Judges 21:19–24)
Military contingents of 600 (Judges 18:11, Judges 18:16, Judges 18:25; Judges 20:47; Judges 21:1–25, Judges 21:12, Judges 21:14, Judges 21:16–17, Judges 21:23)
1 There was a man of the hill country of Ephraim, whose name was Micah.