Headquarters adjectives are listed in this post. Each word below can often be found in front of the noun headquarters in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing HEADQUARTERS.
administrative, american, at, austrian, brigade, british, central, confederate, corporate, democratic
denominational, different, divisional, english, european, first, former, forward, french, general
german, gestapo, global, higher, imperial, international, local, main, military, national
naval, near, new, official, old, operational, original, other, own, permanent
political, present, provincial, prussian, regimental, regional, republican, respective, russian, secret
small, temporary, tribal, unofficial, various, very, world
Hope this word list had the adjective used with headquarters you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.