Taiwan
Taiwan needs to have a pretty substantial backing because of its affiliation with China. As of 2020, there were 300,000 active members of the military as well as 1.6 million reserves in case of an emergency. The Chinese Army is based mainly here, though the remainder resides in Penghu, Kinmen, Matsu, Dongsha, and Taiping Islands.
Switzerland
Did you know Switzerland has a pretty impressive military defense force? For a neutral country, that doesn't mean they're open to intruders. With a total population closer to 8.4 million citizens, there are only about 21,000 active soldiers in their force. This beautiful nation doesn't need to worry about a navy, a perk of being landlocked!