This hetalia foto contains
boina verde, fuerzas especiales, soldado de élite, soldado de élite de boina verde, and fuerzas especiales.
There might also be
las piernas desnudas, pantimedias, pantalones ajustados, ceñido, piernas desnudas, pantalones ajustados a la piel,, medias, pantalones ceñidos, ceñidos, calcetería, manguera, fusilero, and rifleman.
The song is Just Around the Riverbend from Pocahontas. I didn't put much thought into how this song fits the Far East Asian countries. Maybe they felt like this right before meeting 19th/20th century Western countries.