The four imperial nations of Dan 2, 7, 8, and Rev 12. i.e. Babylon, Medio-Persia, Greece, and Rome held a great deal of the earth’s territory.  These are the modern nations that were formerly under the control of these four imperial nations. They are the largest possible extent of those nations that are destined to be ground to dust. (Hope we got them all.)

. . . then the iron, the clay, the bronze, the silver, and the gold, all together were broken in pieces, and became like the chaff of the summer threshing floors; and the wind carried them away, so that not a trace of them could be found. But the stone that struck the image became a great mountain and filled the whole earth. Dan. 2:35

Afghanistan

Albania

Algeria

Armenia

Austria

Belgium

Bosnia and Herzegovina

Bulgaria

Croatia

Cyprus

Czech Republic

Denmark

Egypt

France

Germany (is too big)

Greece

Hungary

India

Iran

Iraq

Israel

Italy

Jordan

Kuwait

Lebanon

Libya

Luxembourg

Macedonia

Malta

Netherlands

Portugal

Romania

Slovakia

Slovenia

Spain

Switzerland

Syria

Tunisia

Turkey

United Kingdom (is too big)

Vatican City