His 20-year reign, weak at best, ended in all-round  abdication, arrest, and war.
For 20-years he ruled the country successfully with both an iron fist and a soft glove.
mnli hypothesis: For 20-years he ruled the country successfully with both an iron fist and a soft glove. premise: His 20-year reign, weak at best, ended in all-round  abdication, arrest, and war.