Answer:
Colonized and settlment?..okie lets see what i can do..
Explanation:
Colonized, would be that, that area was developed and people built homes or buildings/ a town to make it livable. OR that a group of settlers were sent there, on behalf of a government, to instill political control over it. Settlement, a place where prior to that, no one lived there, but it--presently--is being settled. 
 
        
             
        
        
        
Constantinople was able to survive due to its <em>strategic</em> location and <em>sofisticated</em> system of fortifications. 
Constantinople was able to survive as the <em>central</em> hub of the European culture  throughout the early 1000s due to its strategic location, the city was located in a strait between the Black and Mediterranean Seas, between Europe and Asia, which allowed the city to be prevented from many invaders, from Hunes to Arabs. 
In addition, the city counted with a sophisticated system of fortifications which made impossible any attempt of siege until the appearance of first developments on modern artillery in the 15th Century, and the city was well communicated with the most important nations in Eastern and Western Europe by sea (i.e. Italy, Carolingian Empire, Kiev' Rus), of which the city may receive reinforcements in desperate situations.
We kindly invite to check this question on Constantinople: brainly.com/question/20238247
 
        
             
        
        
        
To avoid wars in the future
        
             
        
        
        
‘fall suddenly’ is what it means in historical terms. Hope this can help! :O