In ancient Sparta did men have to become a soldier?

If you were a true Spartiate (Spartan) yes. The sole purpose of all men was to serve the country. Work would be done be the Helots (and some by the Perioikoi) and food would be provided by the state. During peace, a man had to train in exercise, tactics and warfare every day as a duty. On war his sole duty was to die for his county in which -only- case he could have a gravestone.