What is to force someone to serve in the military

Forcing someone to serve in the military is called drafting. When people come of age, they are taken to the military to train to become soldiers in case a war breaks out. This way, the country maintains a steady number of soldiers who will fight if a war starts in their state. In some countries, drafting is obligatory, whereas in others, people have the chance to choose whether they want to go to the army or not.

Where are the subjestions