When thinking about neutrality, it's worth comparing the Ukraine-Russia relationship to that of Vietnam-China, another case of dealing with an aggressive big neighbor. Despite having many disputes with China on the sea, as well as the shadow of the 1979 invasion still looming, Vietnam has a clear "four-nos" policy, which means no military alliance, no affiliation with one country to counteract the other, no foreign military base in the Vietnamese territory to act against other countries, and no force or threatening to use force in international relations.