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4 votes
3 answers
461 views

How would warfare change if everyone were concentrated into giant cities?

Due to environmental concerns (very cold winters) humans are concentrated into a few large cities all around the world; smaller isolated settlements die out quickly. These cities would form the basis ...
Boo Radley's user avatar
  • 1,196
28 votes
22 answers
6k views

What would cause city walls to return?

Essentially, what would, in a modern (21st century) society, cause city walls to return? I don't necessarily mean stone walls; steel, titanium, and aluminum walls are perfectly acceptable. This ...
Firedestroyer's user avatar
3 votes
4 answers
2k views

How to protect a secure compound breached by a small modern military?

I am trying to work out some of the final details of a modern urban compound, surrounded by perimeter walls and a gate. A battle (modern urban warfare with firearms and grenades mainly) takes place ...
FrontEnd's user avatar
  • 532
18 votes
7 answers
8k views

U.S. Army/Military's response time to an army appearing in the middle of a major city

In the scenario I have in mind, a handful of portals appear in a major U.S. city from which an army of golems starts pouring forth with the intent to cause as much damage as possible. The specifics ...
Azumentris's user avatar
22 votes
21 answers
4k views

In a world of magic, why would cities still find high walls useful?

In a world where magic exists. A large army can hire several mages that able to cast spells as, or even more, powerful than a 16-19th century cannon. The city walls will not keep out a determined mage ...
Vincent's user avatar
  • 16.9k