The notable military strategy used by the Hawaiians against the British in the early 1800s was the guerrilla warfare. The Hawaiians utilized their knowledge of local terrain to conduct surprise attacks and ambushes, which proved effective against the British expansion. Despite facing superior military technology, Hawaiian warriors leveraged their familiarity with the islands to launch strategic offensives that disrupted colonial efforts. This tactic showcased the resourcefulness and determination of the Hawaiian people in defending their land against foreign intrusion during a time of significant imperialistic endeavors in the Pacific region.