You're thinking of the Crusades. Their history is complex. In brief, the 11th Century saw a division between the Eastern (Greek-speaking) and Western (Latin) Churches. Islam was advancing on Eastern Christian sites and in 1095 they controlled the access of pilgrims to Jerusalem. As a result of some conflict between the two major Muslim sects, Sunni and Shiite, the victor turned on the Christians, accusing them of helping the other side. Persecutions increased, including the closing of the pilgrim routes.
The Eastern Patriarch appealed to the Pope, Urban II. Realizing the opportunity to reunite (under his leadership) a church divided since 1054, Urban authorized a crusade to re-open the pilgrimage routes. At this time, not only was there considerable religious fervor in Europe, but many people were dispossessed of land, owing to the practice of primogeniture and a growing population, so a somewhat disorganized army was raised and sent to the "holy land."
This was the first Crusade. It took the Muslims by surprise and was a great success. Not only were the routes reopened, but many of those dispossessed found new territories for themselves in what they called Outremar.
The Muslims regrouped, took back most of the land, Europe launched a second crusade, which was repulsed, then a third (this is the famous one, with Richard the Lionhearted and Phillip Augustus and Frederick Barbarosa, though he died on the way). Others followed, most historians record them at eight but some say nine, not counting non-combatant ventures like the ill-fated "Children's Crusade."
Eventually, the Muslims took back all the conquered land (the petty kingdoms of Outremar were largely unsupported by the folks back in Europe).
The results? Like most great efforts, good and bad. Trade with the East was increased, sparking science and technology. New foods (like Oranges) entered the European diet. Trade also brought new diseases, like the Great Plague of 1347. The experience of the Crusades also scarred the Muslim psyche to an extent all out of proportion to the actual events. (At the same time as the Crusades, the Mongols of Chingiz Khan were gobbling up half the Muslims' territories in the East, compared to Crusade holding a little bigger than modern Israel.) To this day, demagogues in Islamic countries scream about "Crusaders" meaning almost anybody except Muslims (Jews are included, which they must find strange, since most Crusaders were no friends to them).
Even the word, "crusade," which in the West means "concerted action to correct a problem" as in "Crusade for Literacy," or "crusading newspaper exposes political corruption," excites Muslims the way "Communist" or "witch" used to excite folks in the Bad Old Days.
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Comments on answer above:Refer to question below.
Jerusalem
Spain was historically a christian country when Muslims fought it and invaded it, it was ruled by Muslims but as the time passes the empire grew weaker and weaker and Christians fought to regain the country.
The armies that the Crusaders were fighting were mostly compromised of either Muslims or Christians. They were claiming to be fighting for religion.
The new weapon used by the Muslims to fight crusaders was the _______.crossbowThe new weapon used by the Muslims to fight crusaders was the _______.The new weapon used by the Muslims to fight crusaders was the _______.
no
Christians and Muslims
No, he sent Christians to fight. The Turks were Muslims.
Jerusalem
the christians attacked the Muslims but they did fight back and the war went on .
The Muslim's won the crusades.
The Crusaders, who were predominantly Christian knights from Western Europe, were the first Christians to fight against Muslims for control of the Holy Land during the Crusades in the 11th to 13th centuries.
They fight in the Middle East, but, get along elsewhere in the world.
a fight between the Christians and the Muslims over Jerusalem (their holy land).
Richard I was supposed to send the knights to fight the Christians but they wouldn't take any of it.
JERUSALEM was a holy city hotly contested between Muslims and Christians during the centuries of the Crusades.
The Crusades, a series of religious wars between Christians and Muslims, officially ended in 1291 when the Muslims captured the last Christian stronghold in the Holy Land. However, tensions and conflicts between Christians and Muslims have persisted in various forms throughout history.
The first people in the "army" to fight was common people led by Peter the Hermit.