What types of clues in a poem let you know that you should use a different tone?

The use of words, theme, mood of the poet and uses of various phrase can tell that you should change the tone .

Explanation:

The author’s word choice and use of punctuation will often serve a as clue to what type of voice should be used to read the poem. If there are a lot of short action-packed words, you should read the poem with a quick, excited voice. If there are a lot of commas and line brakes, you should read at a slower, calm voice

short and simple

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.