(history) the Kingdom of Yugoslavia

historic, historical / already-happened, past / former, old, traditional

important, significant

importance, consequence, significance

Yugoslavia

a land, a large place / a country in general, a region / a country as in a nation, a state / the office of emperor, the crown; affairs of state / a province of ancient Japan

history / the study of history

"Historical kana usage", a prescriptive method of using kana to write Japanese. Devised in the Edo period by Keichū (契沖) and taught in schools until 1946, it aims to be etymologically faithful and reflects earlier stages of the language (Heian period and earlier).

kingdom (realm ruled by a king and/or queen) / (figuratively): kingdom (realm or conceptual space where something is dominant)

a target, a mark, a bullseye / an objective, an object (of doing something)