You didn't really provide any options here but we can safely say that Alexander's army (if you're talking about the army of Alexander the Great) was alert because they were trespassing in foreign terain where they could be attacked at any time.
Brigham Young was the one who led the mormons to present day Utah when searching for religious freedom.
Members of the Church of Jesus Christ of latter day Saints had been persecuted for their beliefs since the founding of their church so, on February 10, 1846 Young began leading 1,600 mormons West to escape the persecution.
When they were led to Utah, Young became known as “Mormon Moses”
The NAACP, or National Association for the Advancement of Colored People, is an old and influential organization that seeks to protect the civil rights of minorities, especially the black population of the United States.
It was founded at the beginning of the twentieth century in 1909 with the sole purpose of fighting for the rights of African Americans, working mainly in the area of education and the judiciary, with respect to protecting this minority of racist laws, such as Jim Crow, which intended to deprive blacks of possessing civil rights.
Nowadays, the term "colored" is seem as outdated and obsolet by a great quota of the population, that prefers the terms "afro-american", "african-american" or "black".
