The short answer is no, there was not.

The longer answer is that medieval polities were not organized like modern states, and medieval armies were not organized like modern armies. There was no extensive bureaucracy akin to a war department to systematically process all the information of war. At best, in the more highly centralized kingdoms such as England, you had a core of personal followers around the king who handled matters of logistics. Armies were ad hoc affairs, generally raised for a single campaign and disbanded at its conclusion, and recruitment was vastly more personal and disorganized. The king did not send out recruiting parties to comb the land for able-bodied men; he (depending on time and circumstances) hired mercenary companies, called on the great lords to gather their armed followers, called out town militias, and enlisted fighting men into his own household. If your family learned about your death, it's almost certainly because someone who knew both you and them came back and told them.