盟 - alliance, oath

leader (of an alliance); leading power

oath; pledge; pact; covenant; alliance

sworn friend

joining (an association, agreement, etc.); participation; affiliation; accession

alliance; union; league

league; federation; union

allied armies

non-alignment; nonalignment

signatory (country); party (to a treaty)

non-member state; non-member nation

member countries (e.g. treaty, UN, etc.); member states

allied nation; ally