Aside from White Europeans fighting and Invading themselves Only 3 other non European empires came close to conquering the whole of Europe. These are the Battle and Events that stopped that from happening.
Green - Umayyad Caliphate
Red - Ottoman Empire
Orange - Mongol Empire
White - European land that was never conquered by foreign Invading forces
These events did not happen at the same time because non of these empires existed simultaneously.
They happened hundreds of years apart, but they are the most important battles that saved Europe.
1. The Battle of Tours (732 A.D)
The Umayyad Caliphate invaded France but were unsuccessful
https://en.wikipedia.org/wiki/Battle_of_Tours#Battle_.28October_732.29
2. The Battle of Cerami (1063 A.D)
A huge Nordic army took advantage of the civil-unrest between the Emirs of Sicily. Invading Cerami and destroying the Emirate of Sicily
https://en.wikipedia.org/wiki/Battle_of_Cerami#Siege_of_Cerami
3. The Battle of Legnica (1241 A.D)
The Mongol Horde Invaded Legnica-Poland and Summarily destroyed Nights of The Templar, Polish, and Czech Armies. They intended to take the whole of central Europe but were cut short by the death of Ögedei Khan. Right after they won the Battle the armies and their generals were ordered to come back to Mongolia to attend the burial of the old khan and crowing of the new.
https://en.wikipedia.org/wiki/Battle_of_Legnica
4. The Battle of Vienna (1683 A.D)
After the Ottoman Empire took and besieged the Imperial City for 2 months, the Habsburg Monarchy, the Polish-Lithuanian Commonwealth and the Holy Roman Empire, joined forces under the command of King John III Sobieski against the invading Ottoman Empire to lift the siege Vienna. The battle marked the first time Poland and the Holy Roman Empire had cooperated militarily against the Turks, and it is often seen as a turning point in history. In the ensuing war that lasted until 1698, the Turks lost almost all of Hungary to the Holy Roman Emperor Leopold I
https://en.wikipedia.org/wiki/Battle_of_Vienna
Imagine if The Ummayads, Ottomans, or Mongols continued on and won those wars.
Europe would look a whole lot different today.
Green - Umayyad Caliphate
Red - Ottoman Empire
Orange - Mongol Empire
White - European land that was never conquered by foreign Invading forces
These events did not happen at the same time because non of these empires existed simultaneously.
They happened hundreds of years apart, but they are the most important battles that saved Europe.
1. The Battle of Tours (732 A.D)
The Umayyad Caliphate invaded France but were unsuccessful
https://en.wikipedia.org/wiki/Battle_of_Tours#Battle_.28October_732.29
2. The Battle of Cerami (1063 A.D)
A huge Nordic army took advantage of the civil-unrest between the Emirs of Sicily. Invading Cerami and destroying the Emirate of Sicily
https://en.wikipedia.org/wiki/Battle_of_Cerami#Siege_of_Cerami
3. The Battle of Legnica (1241 A.D)
The Mongol Horde Invaded Legnica-Poland and Summarily destroyed Nights of The Templar, Polish, and Czech Armies. They intended to take the whole of central Europe but were cut short by the death of Ögedei Khan. Right after they won the Battle the armies and their generals were ordered to come back to Mongolia to attend the burial of the old khan and crowing of the new.
https://en.wikipedia.org/wiki/Battle_of_Legnica
4. The Battle of Vienna (1683 A.D)
After the Ottoman Empire took and besieged the Imperial City for 2 months, the Habsburg Monarchy, the Polish-Lithuanian Commonwealth and the Holy Roman Empire, joined forces under the command of King John III Sobieski against the invading Ottoman Empire to lift the siege Vienna. The battle marked the first time Poland and the Holy Roman Empire had cooperated militarily against the Turks, and it is often seen as a turning point in history. In the ensuing war that lasted until 1698, the Turks lost almost all of Hungary to the Holy Roman Emperor Leopold I
https://en.wikipedia.org/wiki/Battle_of_Vienna
Imagine if The Ummayads, Ottomans, or Mongols continued on and won those wars.
Europe would look a whole lot different today.