The army generals in Myanmar know how its done. Now South Korea is getting into it. The dimissed president has called in the army to protect him against a court order and arrest by police. In effect this is a new martial law dictatorship.  In a shoot out between judges and troops, the odds are not good.  So both north and south Korea are under the hammer. It's all very quick, tidy and suits elderly orange presidents.

Arrr, aye - retain trappings of Overlordship by force and vestiges of now old and worn-out Feudal system where King can impose at will.....  arrrr-aye ... touch forelocks and say 'Aye'!  or it's Dismissal for you and worse!

Make sure the Old Guard never lose control over the peasantry - damn - that would startle the horses....          

For the umpteenth time - you can organise a Republic any way you want.... you don't need to be bound to the failings of past similar government styles.