The record of the first cycle is given in 3:7-11a.
The children of Israel did evil in forsaking Jehovah to serve the Baalim and the Asheroth (v. 7).
Because Israel did what was evil in the sight of Jehovah, His anger burned against them (v. 8a).
Jehovah sold Israel into the hand of Cushan-rishathaim, king of Mesopotamia, and Israel served him eight years (v. 8b).
The children of Israel cried out to Jehovah (v. 9a).
Jehovah raised up a savior, Othniel the son of Caleb’s younger brother. The Spirit of Jehovah came upon him, and he saved Israel from Cushan-rishathaim (vv. 9b-10).
The end of the first cycle was that the land had rest forty years (v. 11a).
In 3:11b-31 we have the second cycle of Israel’s miserable history.
In verse 11b we are told that Othniel, the judge, died.
After the death of Othniel, the children of Israel again did that which was evil in the sight of Jehovah (v. 12a).
Because Israel did that which was evil in His sight, Jehovah strengthened Eglon king of Moab against Israel. Eglon gathered the children of Ammon and Amalek to himself and went and struck Israel, taking possession of the city of palms (vv. 12b-13).
Israel served Eglon king of Moab eighteen years (v. 14).
Israel cried to Jehovah, and Jehovah raised up a savior for them, Ehud the son of Gera, the Benjaminite (v. 15a).
Ehud killed Eglon king of Moab by a scheme, and then he defeated the Moabites with the children of Israel from the hill country of Ephraim, killing about ten thousand Moabites (vv. 15b-29).
Moab was subdued that day by Israel, and the land had rest eighty years (v. 30).
After Ehud there was Shamgar the son of Anath, who struck six hundred Philistines with an ox goad. He also saved Israel (v. 31).