Answer:
1. (The top one) Muhamad
2. (The middle one) Mecca
3. (The bottom one) Diplomatic training
Corroboration is a term that means evidence or support to your statements. In the jury, a corroboration can be made if you have a witness to a case or if the lawyer presents hard evidence gathered from the site questioned.
Both nationalism and imperialism, along with militarism, were very intertwined during this time, since nationalism created an "us vs. them" type of mentality that led countries to want to take over and occupy more territory.
It depends on what time period, it could be british rule