There were two of them: the United States at the Mexican-American War (1846-1848) and France at the French Intervention (1861-1867).
Western parts of the Soviet Union were occupied in World War 2 by the Germans, but never the entire country.
The Russian Army occupied the DDR or East Germany after the war and had troops garrisoned there until 1989-90.
Japan
The terms were used when allies occupied the nation during or around World War 2. Whoever controlled the government occupied the country.
The Mexican-American War was about which country owns Texas.
Mexico was occupied by France during the American Civil war.
Mexico City.
Spain. Later Mexico was occupied by France but won that war too.
US Forces occupied Mexico City.
There is no such country as "Finand".
Gemany
The US .
Japan
Japan.
Western parts of the Soviet Union were occupied in World War 2 by the Germans, but never the entire country.
France, Britain and the United States occupied the western half of Germany. Russia occupied the eastern half of Germany.
The Russian Army occupied the DDR or East Germany after the war and had troops garrisoned there until 1989-90.