While you didn't really provide the "following" as the comment above me states, in general, the advantage of secondary sources of primary ones is that they perhaps provide a more objective or even just a broader view on a certain topic. While a primary source of the American civil war would be a letter written by a soldier, a secondary source would be a book that describes more letters taken together and discusses possible information regarding them.
"The main reason why the author invents various citizens and residents of Verbonia is to "<span>to draw readers into the story of the city's life" among other things. </span>
Zheng He's first voyage (1405-1407) began in July 1405. They set sail from Liujiagan Port in Taicang of Jiangsu Province and headed westward. The fleet had about 208 vessels total, including 62 Treasure Ships, and more than 27,800 crewman. They traveled to present day Vietnam.
Not sure but hope what I know help a little...Slavery was “an unqualified evil to the negro, the white man, and the State,” said Abraham Lincoln in the 1850s. Yet in his first inaugural address, Lincoln declared that he had “no purpose, directly or indirectly, to interfere with slavery in the States where it exists.” He reiterated this pledge in his first message to Congress on July 4, 1861, when the Civil War was three months old.<span>Did You Know?When it took effect in January 1863, the Emancipation Proclamation freed 3.1 million of the nation's 4 million slaves.</span>
What explains this apparent inconsistency in Lincoln’s statements? And how did he get from his pledge not to interfere with slavery to a decision a year later to issue an emancipation proclamation? The answers lie in the Constitution and in the course of the Civil War. As an individual, Lincoln hated slavery. As a Republican, he wished to exclude it from the territories as the first step to putting the institution “in the course of ultimate extinction.”