three countries
Three Kingdoms (in China, 220 CE-280 CE)
Three Kingdoms (in Korea, 57 BCE-668 CE)
「三国」 has another reading with different meanings.
Silla (ancient Korean kingdom; 57 BCE-935 CE)
Baekje (ancient Korean kingdom; 18 BCE-660 CE); Paekche
Wu (region in China, south of the lower Yangtze)
Wei (kingdom in China during the Three Kingdoms period; 220-266 CE); Cao Wei
Goguryeo (ancient Korean kingdom; 37 BCE-668 CE); Koguryo
Sichuan (province in China)