Austria-Hungary had invaded and crossed over into, Serbia and Russia was in an alliance with Serbia, so they felt as though they had to help out. Hope this helps.
The correct answer to this open question is the following.
Unfortunately, you forgot to include the map to answer your question.
However, we can comment on the following. Hope it is useful.
We did some research and found a map titled "The Viking Age, A.D. 800-1000." The map is included in a lesson to develop Geography skills such as interpreting symbols, lines, and labels.
If this is the correct map to your question, then the correct answer is the following.
The city on the map that is farthest from the Vikings' homeland is Rome, followed by Paris, and the closest city to Vikings homeland, that appear on the map is London.
The homeland of the Vikings was the modern-day Scandinavian territories of Sweden, Denmark, and Norway.
Good Friday was signed 1990 I'm not aware of the others.
This is important, because this lead to more trade routs with other countries, and this strengthen the empire as a whole. These roads also lead to more connections to cities, and lead to more homes, and overall improved their society as a whole.
Gold..........................
