pokoravati

1. (+ acc.) to subjugate; to conquer
   Rimljani su vekovima pokoravali susedne narode. — The Romans subjugated neighbouring peoples for centuries.
2. (pokoravati se + dat.) to submit; to obey
   On ne želi da se pokorava nikome. — He doesn't want to submit to anyone.
   Vojnici se pokoravaju naređenjima komandanta. — Soldiers obey their commander's orders.

In the sense "to obey" it takes se and the dative: pokoravati se zakonu.