In Plessy v Ferguson (1896), the Supreme Court upheld the legality of segregated public facilities based upon race.
This led to the policy of "separate but equal" which meant that throughout the United States, public and private organizations were able disallow people of color from schools and bathrooms as long as they had separate facilities for people of color.
Advantages : Familiar with the area and also they have a better general and also better soldiers
Disadvantages : Less Soldiers, Less military power
Aniconism is important for Islamic art because it is usually forbidden to depict things from holy scriptures in art. This is why Islamic art has usually developed in the form of Arabesques for example or other artistic forms that do not depict actual parts of the physical or metaphysical world. If the art pieces start getting destroyed because of aniconism, it's called iconoclasm.
Facade's are an important part of Islamic art because of the aniconism idea. This is why things like temples or palaces had carvings on facades that were either in forms of arabesques or were done to show a relief or anything similar. They are often great feats of architecture since it required great skill to make facades at older times.
Qur'an is important for Islamic art because it of two reasons. One is that there are guidelines on what can and what can be presented in art for various reasons that are spoken there. Another is that many copies of Qur'an are pieces of art on their own because of illuminations which i when the Qur'an would be copied with magnificent artistry drawn or painted around the texts.
Congress can override a regular presidential veto by a two-thirds vote of both houses. The Supreme Court and other federal courts (judicial branch) can declare laws or presidential actions unconstitutional, in a process known as judicial review.
The four main of what? can I get more of the question.