After the division of the Mongol Empire, Kublai Khan ruled over the largest stretch of territory. He controlled Karakorum and the Mongol homeland, the entirety of China and Korea, parts of southeast Asia, Tibet, and parts of Central Asia.

After the fall of the Tang dynasty in the early tenth century, China fragmented into several smaller states. The largest of these states was the Song, which ruled over a stretch of China from the Yellow river in the north to the Vietnamese border in the south.

The Tang dynasty, which ruled from 618 - 906 CE, was the most powerful Chinese dynasty of the classical period. The Tang ruled over the largest stretch of the land of all these dynasties; including parts of Central Asia, Tibet, Manchuria, and southeast Asia.

The Inca Empire was founded in modern-day Peru, with the Kingdom of Cusco, by Pachacuti in the fifteenth century.

The Sassanid Empire emerged from the ashes of the Parthian Empire in the third century. It was the last Persian ruling dynasty of Iran before the Muslim conquests of the seventh century. The Sassanid Empire ruled over the vast majority of the territory that would today be recognized as the Middle East for four centuries.

The Uyan Dynasty (also called the Yuan Dynasty) was founded by the Mongolian warlord Kublai Khan in 1271. Kublai Khan was the grandson of Genghis Khan, and he inherited a large swathe of Genghis’ massive territorial conquests. Kublai Khan established his capital at Beijing and proceeded to conquer and unify the rest of (what was at the time) China.

All of these empires were completely destroyed by the Mongols in the thirteenth century. The Mongols infamously sacked the city of Baghdad, leading to the destruction of the Abbasid Caliphate and the subsequent degradation of this part of the world for centuries. They conquered Song China and established the Yuan dynasty. They dismantled the Khwarazmian Empire and established the Il-Khanate. They also destroyed the Kievan Rus and founded the so-called Golden Horde which ruled Mongol territory in modern-day Russia and Eastern Europe. These are just a few of the empires destroyed by the Mongols.

The Visigoth kingdom on the Iberian peninsula was conquered by a Muslim force of Arabs, Berbers, and other Africans who sailed from North Africa to Gibraltar.

Communism would not come to exist for over another thousand years, and though the Spanish civil war of the 20th century featured Communists, they eventually lost to fascist forces.

Napoleon Bonaparte invaded Spain during the early 19th century, over a millennia after Visigoth culture ceased to exist, and although his invasion was very bloody, it was not very successful.

The British navy did conduct operations in Spain, capturing Gibraltar, but this was in the early 18th century and against the Spanish government, not the Visigoth kingdom.

The Spanish-American war was fought at the very end of the 19th century in the Pacific and Caribbean; at no point did any of the Iberian peninsula become a battlefield.

Osman I founded the Ottoman Empire at the very end of the thirteenth century and, although it was only a minor emirate during his lifetime, it soon grew to control most of the Middle East and a large portion of southeastern Europe.

All of these statements are correct except that the Mongol territory was divided into two great empires. It was, in fact, divided into four great empires — the Empire of Kublai Khan, which ruled over China and the Mongol homeland; the Jagatai Empire, which ruled over Samarkand and Central Asia; the Golden Horde, which ruled over Russia and parts of Eastern Europe; and the Ilkhan Empire, which ruled over parts of the Middle East and Persia.