Yoshitsune is writing a letter to the Shogunate to apply for a break. She realizes that the farther out that they get from the Shogunate there are more independently-ruled states making information gathering difficult.
During the great war against Kamikui in past, Kagura Shogunate's army suffered heavy losses, which lead to a weakening of its influence. Even with heavy losses the Shogunate took it upon themselves to rebuild outer territories and have protected the country thus far. They will continue to protect this land and this truth will never falter. As a member of Shogunate, she will protect both country and Lady Shizuka.
Yposhitsune wakes up from her brief history lesson wondering what the point in telling you this story was. She apologizes for boring you with history lessons.