Questions tagged [military-defense]

For questions about strategies and structures for defending from a particular type of attack

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38
votes
20answers
10k views

How would space battles alter combat tactics?

A thought occurred to me while watching Ender's Game. Why are these two fleets in space lining up like two armies during the revolutionary war (or pick your war of the musket/volley era)? Thinking ...
48
votes
5answers
4k views

How would the existence of large rideable flying creatures have changed the design of castles?

I'm thinking not only of the impact they would have had on how you would defend from an aerial attack, but also that they could be used for much more specific bombardment by dropping large rocks and ...
47
votes
17answers
3k views

What would be the most effective way of keeping a psychopath with a spaceship from wreaking severe havoc in a suicide crash?

Any spaceship over several hundred tons is an extremely dangerous weapon in the wrong hands, particularly if it's intended for reentry. Made mostly of metal and possibly shaped to be able to breach ...
10
votes
9answers
976 views

Defeating the revised Snakebot of Doom

In Weapons for a civilisation-destroying giant robot I asked about what weapons might be placed on a sixty-billion-ton fusion-powered snakebot 9.27 km long and 1.19 km in diameter, armoured with 224 ...
50
votes
9answers
6k views

What would the fortifications of an underwater city look like?

Merpeople, along with other similar underwater humanoids, are often depicted as living in great cities beneath the waves. These cities have many positive things going for them: plenty of real-estate, ...
34
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21answers
8k views

How would cities be designed that were threatened by dragons?

The dragons aren't all that common but they live in the nearby mountains and after a harsh winter are more likely to come looking for easy prey to fatten back up on. What are the major design ...
30
votes
4answers
2k views

How would the design of a habitable underground fortification differ to that of a castle?

As a follow up from riding flying creatures to attack castles, let's assume that the practice is now so prevalent that a standard castle is no longer defensible. How would the fundamental design of a ...
3
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6answers
387 views

World Ending Asteroid

[Introduction] Set in present day Earth, several space agencies and military across the globe had been closely tracking many near earth objects for many years using deep space telescopes and also an ...
23
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8answers
5k views

Could a Mars colony use asteroids as weapons against the earth?

If a future Mars colony declared war on the Earth, would asteroid manipulation be a feasible option as an effective weapon against the Earth from a Mars colony? How would this be accomplished? Are ...
11
votes
9answers
2k views

Klemperer rosette vs Relativistic Kill Vehicles

In the book The Killing Star, Relativistic Kill Vehicles (RKV) are described as the ultimate weapon. They are described as impossible to stop, so that any civilization that develops them better ...
22
votes
5answers
3k views

Deflective properties of a forcefield

I have always though of three basic ways that force fields function. The first way is that the force field projects an indestructible shell that oncoming objects can never break. Further, the ...
26
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18answers
8k views

Can spacecraft defend against antimatter weapons? How?

Here is what we know: We have the means to create stable antimatter We can direct it in a beam It can travel nearly as fast as light with ease Antimatter and matter combine in dangerous ...
24
votes
2answers
650 views

How would sails from a fireproof material affect ship's performance?

Related to: How would rudder protection against water elementals affect ship's performance In a world with ordinary magic, military ships should be prepared for enemy fireball-hurling wizards. Is ...
16
votes
6answers
2k views

Space, the final frontier … to defend

OK, so you've got an empire in space. And that empire has a frontier. Now on Earth, we have many ways to defend a frontier. We can build border fences or even walls, we can build watch towers, and of ...
11
votes
7answers
1k views

Defensive strategies against teleporting dragons

I have finally found an edition of the Dragonriders of Pern trilogy - living in Italy, I only had access to it thanks to my father's old books, and he doesn't own the complete series - so I have been ...
0
votes
9answers
1k views

Defeating this fleet [closed]

I was watching the series called: "Once Upon a Time... Space" (I could only find the hungarian dub, which is my native language), that I want to make a fanfic about, and I ran into a problem.... The ...
5
votes
5answers
1k views

Would an actively camouflaging airship cast a shadow?

I am currently writing about a military society that enforces its subjects using Acer-class airships. Picture the USS Iowa, except flying and with enough supplies for a year in the air. The only ...
2
votes
2answers
339 views

Using magnetic repulsion to build zombie-proof building

There has been much thought on how to create a zombie-proof building but I think I have this figured out. I propose a building that covers an area of about one city block, so: 264 x 900 ft, that ...
0
votes
6answers
1k views

Can a secondary fuel economy ever be hardened against attacks?

If a society fully centralized their energy supply to a secondary fuel (artificial energy source like Hydrogen or batteries), the public loses the ability to directly access energy from the earth. ...
52
votes
26answers
16k views

What would induce a country to actively guard an empty wasteland?

One of my favourite stories features a major fortress built on the edge of a poorly surveyed wasteland. In that context, the Butte makes sense, as a safety measure against the unknown. Once the wastes ...
30
votes
7answers
3k views

What would an avian “castle” look like?

How would avians build a defensive structure? What would be the equivalent of walls, a drawbridge, a dungeon, etc. If two avian / arial cultures were at war, say birds vs. dragonflies, how and where ...
53
votes
22answers
10k views

How do I defend an island nation from attackers with 15th century technology?

Apologies in advance that my bullet points got away from me and turned out a bit long, but I'm trying to give as much information as I can to ward off initial questions. Imagine the following ...
16
votes
8answers
1k views

How would a city with high defences fare against airborne creatures?

This always has been a point of trouble for me as a World Designer. How would a fantasy city be well-protected against airborne creatures? In all the examples we have on our own world (Earth) being ...
12
votes
4answers
1k views

How would humans defend themselves against mice that are sentient and intelligent?

In How would sentient intelligent, normal-sized mice fight against humans? Humans are not doing well at fighting against the mice. They are small, smart and deadly. Humans will have access to ...
5
votes
4answers
7k views

Should castle walls be circular or square?

In many medieval portrayals, the walls of castles are always portrayed as square. But would the castle be better off if the walls were circular instead of square?
25
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6answers
9k views

Can one nuke reliably shoot another out of the sky?

A quick glance at real world anti-missile systems seems to show that they do work, but imperfectly. The problem naturally gets harder when the incoming missile is extremely high-velocity. If your ...
4
votes
3answers
629 views

Is it theoretically possible to use electromagnetic, RF or heat energy to produce a ship forcefield?

I'm looking for a credible technology which could be used as a shield for a spacecraft sometime within the next 100-200 years. Not necessarily a spherical shield which covers the whole ship, it would ...
15
votes
6answers
2k views

How to accomplish planetary independence

Inspired by this question: How many of a Typical Sci Fi Army would you need to take a planet? Let's have a Galactic Empire which spans the galaxy. The Empire is ruled by The Emperor from one central ...
5
votes
6answers
506 views

Defeating the Snakebot of Doom

In Weapons for a civilisation-destroying giant robot I asked about what weapons might be placed on a sixty-billion-ton fusion-powered snakebot 9.27 km long and 1.19 km in diameter, armoured with 224 ...
27
votes
6answers
10k views

If the Cold War went hot in the early 1970s, would the Warsaw Pact be able to reach the Rhine River?

So, let us go back in time to the year 1973, specifically around October of 1973; the time frame of the Yom Kippur War. In our timeline, the conflict almost became WWIII after the Soviets threatened ...
9
votes
6answers
2k views

How would humans in medieval times have adapted to giant roaming golems?

So in a world where giant rock and metal golems 'spawn' naturally. These golems are the kind with a power core hidden inside their bodies, their body and limbs are held together by invisible mana ...
6
votes
7answers
920 views

Defending against directed Gamma Ray weaponry

I am trying to picture how space combat would happen with a sufficiently advanced level of technology (way beyond what we have today), and obviously defense from radiation would be a massive benefit ...
6
votes
3answers
498 views

Character must escape from a CERN/DARPA-like facility - Secrecy

This story is meant to be an introduction and background for a short videogame I'm working on. Our hero works at a secret, hidden facility. The secret is kept among every staff member working there. ...
20
votes
14answers
2k views

Why would you build underground defensive structures in an an alternate world medieval europe?

Assuming a world otherwise like ours and at the same technological level of medieval Europe, what change in the world might have caused people to build defensive structures underground rather than ...
13
votes
5answers
1k views

How could trading posts be defended against pirates?

I got many little trading posts all over my my worlds and orbiting around them. Everyone can trade in there, nice guys as well as scum of all kind. The trading posts are rich places. How could a ...
6
votes
6answers
743 views

Planetary Defenses Against Interstellar Grey Goo Cloud?

I'm writing a story in which a cloud of grey goo is entering the solar system and humanity must prevent any particle of it from reaching Earth (and potentially other worlds too). Alternately, I need a ...
5
votes
3answers
763 views

If a million heavily armed children stormed Area 51 what would they do? [closed]

Say a sorceress secretly enchanted 1 million kids, 12 years old, and under and made them break into Area 51 from all directions what would they do? These kids appear very normal and sane apart from ...
0
votes
5answers
238 views

Fleet defenses against massive creatures [closed]

In my fantasy world, humanity thrives on massive migratory fleets, moving in large numbers between the sparse islands. However, there are massive creatures that live in these places in between, ...
10
votes
2answers
3k views

What would happen if Napoleon had won the battle of Waterloo

Okay, so the Napoleonic wars are raging. Many men are dying in Waterloo. It appeared as if the Duke of Wellington and his allied army would prevail, but Napoleon rallied his troops at the last ...
2
votes
5answers
748 views

A T-90 tank in WW2

A russian scientist wanted to develop a new superweapon : Time travel. So he arranged for a experiment to be made. A tank and its crew was transported back in time to 1941. But there was a problem : ...
1
vote
1answer
448 views

What would have happened if Hitler had launched operation Sea lion (the planned invasion of England in September 1940)? [closed]

I'm writing a story set in an alternative history world but after some research I suspect the scenario I intend to use is unrealistic, so I would like to understand the likely outcome of Hitler’s ...