Armour Piercing Arrows such as those fired by English Longbowmen started their decline, Weapons such as pikes and halberds carried it on and gunpowder finished them off. There were cavalry in most countries' armies right up to WWI but the full-plate armoured medieval knight of old was gone well before then
Knights became obselete at the invention of the longbow- armor could not stop the rounds fired and peasents with bows were cheaper.
Chivalry is not so easily explained but it's death can be traced t the enlightenment, where it began to be satirized.
It was caused by the high number of deaths during early tournaments.
Knights were among the lowest level of the nobility, having titles that were usually not inherited. They ran the manors, protected the serfs on those manors, and provided the basis for raising armies in times of war. They were the heavy cavalry of the Middle Ages, in a time when heavy cavalry was the most important element in warfare. The knights' code, called the Code of Chivalry, which was further developed by such figures as Eleanor of Aquitaine, caused reflection among the higher classes on such subjects as mercy, protection of the poor, protection of women, charity, and so on.
The Missouri Compromise was nullified by the new Compromise of 1850 - caused by the admission of California, which extended a long way on either side of the Missouri line, and rendered it obsolete.
It caused money to become less valuable, making goods difficult to buy.
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the invention of the cannon
La Glorie and HMS Warrior.
It was caused by the high number of deaths during early tournaments.
Knights were among the lowest level of the nobility, having titles that were usually not inherited. They ran the manors, protected the serfs on those manors, and provided the basis for raising armies in times of war. They were the heavy cavalry of the Middle Ages, in a time when heavy cavalry was the most important element in warfare. The knights' code, called the Code of Chivalry, which was further developed by such figures as Eleanor of Aquitaine, caused reflection among the higher classes on such subjects as mercy, protection of the poor, protection of women, charity, and so on.
That would be a quirky way to describe the situation, to say the least. I don't think it is correct. Obsolete and extinguished don't mean the same thing. Something that's obsolete might still be in effect. For instance, someone might say that "The internet makes copyright law obsolete." That doesn't mean that the internet caused copyright law to stop existing.
the thing that caused people to become interested in Alaska was the gold rush.
Manifest destiny caused Oregon country to become a hot political issue.
The Great Depression was the major event that caused President Roosevelt to become more of an internationalist.
the climate
The Great Depression was the major event that caused President Roosevelt to become more of an internationalist.
The haymarket affair caused deaths and job loss causing people to leave the knights of labor
it will become indangered because it won't