15. Lincoln requested the teacher to teach him​

Abraham Lincoln letter to his son’s headmaster is a rulebook of what it should take to effectively raise a child. Each paragraph consists of memorable lessons that every man should know as he grows up.

the answer is: the start of world war i, and russia’s hopes of benefiting from it

during world war i russian joined due to in their current crisis they were being supported by france and the war was already declared to them by germany, they needed to maintain their political goal and leadership role in the balkans, and is the same feeling that this excerpt evoke the eager of maintain the land value.