Sir Gawain declines the Green Knight's invitation because he believes that he has already fulfilled his end of the bargain by allowing the Green Knight to strike him a year ago. He sees the Green Knight's offer as a trap to test his integrity and honor, and he chooses to uphold those values by not engaging in a potentially dishonorable situation.
it was because they had to let the knights be in battle to kill each other and let them die, because they need to.
The Knights of Labor was a large and successful labor movement. It began its decline after strike were unsuccessful and there was mismanagement of the organization.
The Crusades caused many nobles and knights to leave their land which caused feudalism to decline. Because of the decline in feudalism, many kings took the opprotunity to come to power and create a kingdom.
Haymarket Riot of 1886
Knights contributed to the decline of feudalism by becoming more independent and serving various lords for payment, weakening the traditional ties of loyalty and obligation between knights and their lords. Additionally, the power of knights in warfare diminished with the rise of professional armies and gunpowder weapons, making their role less significant in feudal society.
The only surviving Catholic Order which is the direct descendant of the Knights of St. John is the Sovereign Military Order of Malta. Worldwide, there are over 13,000 knights and dames, a small minority of whom are professed religious. Membership of the Order is by invitation only and solicitations are not entertained. (extracted from Wikipedia)
Knights usualy wore a suit of chainmail which was made up of small metal rigs tied together.
The Knights of Labor came into public view after the Haymarket Riot. Although this riot was organized by members of the Union, the bomb that exploded during the riot, killing several people, was not their fault. However, the public then associated them with it and they were labelled anarchists. Their decline soon followed.
The Haymarket Affair, Tuesday May 4, 1886
True
Knights' mail was made out of iron rings. When the knights progreesed to plate armor, it was made of still plates sewn together. The Steel got better in quality over the ages, especially when firearms came to Europe.
Cal Knights Baseball has good coaching, but is very disorganized and seems to care more about getting your money then putting together a competitive team.