That is the correct spelling of the plural noun "ethnicities" (ethnic affiliations, plural of ethnicity).
The ethnicities in the US military generally represented the ethnicities of the US population.
Leo's ethnicities include: Italian, Russian, German, and Polish.
they have just as much as other ethnicities
ethnicities
Australian
Latin European
Mexican American
Indians, blacks, and whites
yes and no
Black American
Mexican
Although Sikhism is a religion that obliterated the Caste System, Sikhism does run with many ethnicities in general. Ethnicities included are from both Islamic Tribes and Hindu Castes, respectfully. Tarkhans, Jatts, Sainis, Khatris, Dalits, etc. are just to name a few.