Step 1: Read the clue carefully.
The description talks of elders teaching culture, history, warfare and ethics to the young, a dormitory-style indigenous learning system.
Step 2: Match it to the right community.
This is the Morung system, a traditional youth dormitory found among the Naga community of Northeast India.
Step 3: Eliminate similar-sounding systems.
Ghotul belongs to the Muria tribe, Dhumkuria to the Oraon, and Jirkedam is not a recognised term here - none of these match the Naga pairing.
\[ \boxed{\text{Naga, Morung}} \]