Shaka expanded his power through a combination of forceful tactics and peaceful diplomacy, inviting chiefdoms to join the Zulu state without violence.
Diplomacy is defined as the skill of managing international relations, typically by countries or governments.
According to the source, Shaka expanded his power by sending amabutho on raids into neighboring chiefdoms.
Two words from the source that suggest Shaka used force to gain power are raids and warlike.
Evidence in the source suggests that Shaka did not only use force to grow his kingdom by inviting chiefdoms to join the Zulu state peacefully through diplomacy.
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