Keep in mind that there are multiple versions of the Arthurian legends, so the function of the Grail changes with the legend. The Holy Grail is blessed chalice that can provide happiness, eternal youth and food infinitely, it's a symbol of divine grace. It's role in the legend is a device for King Arthur's Knights to quest after and go in search of, as well as a healing force to some knights and a test of spiritual purity and worth.
It is to pass legal legislation.
<span>The Battle of Gettysburg has often been referred to as the “High Water Mark of the Rebellion.” Many consider it to be a turning point in the Civil War
because the Union victory placed the Confederacy on the defensive and
ended Gen. Robert E. Lee's most ambitious attempt to invade Union
territory.</span>
In terms of studying that attitude and mentality, it would be helpful to study the journals of someone moving Westward during that time period (mid to late 19th century).
