War Technologies

What can some fighters do with just their swords and bows against a smartly-planned attack with TNT cannons, arrow artillery, and bombard machines that attack from the sky where no one can get or even see them?

All these mechanisms use dispensers with TNT - works in snapshot 13w05a and above.

Information and instructions:

Walls Breaker:
A simple TNT cannon that shoots 24 TNT on a wall and makes a big gate for you to get in your enemy's fort.
It also can cause some damage to the buildings inside the fort.

Massive bombard:
A compact and very simple machine that drop down a lot of TNT very fast and completely destroys the target and the ground under it, nobody can stay alive against it's power, and there's no building except for obsidian bunker that can stand against it.
If you want to destroy more, you can simply add more of these massive bombard machines around, they are very easy to build but they use a lot of TNT and if you'll place it too high the TNT will blow up in the air.
Drops about 100 TNT per second!

Random cannon:
Shoot 8 TNT far up and to the sides in a random direction.
Used to make random damage to big air structures.

TNT Bombard Machine:
TNT used for every shot: 30
TNT that falls on the ground and cause damage: 15 (the other 15 used to push the TNT down faster so it won't blow up in the air)
It's usually invisible if you put it enough high, but don't put it too high!! (it can shot TNT 194 blocks down)
The enemy almost can't get, it if there is someone up there on the bombard machine he can just shot on the enemy arrow and he will fall down and die.
It can cause massive destruction if you put together with some more machines like that.

Put 2 rows of TNT on the pistons and then click the button.

Short-Distance TNT Cannon:
TNT used for every shot: maximum 9 (you can use less if you want to shoot even closer)
It shoots 1 TNT every time (I'll add more later)

very comfortable to attack enemies with wall and bows from a distance they can't shot you with bow.
You should to know where to put TNT and where NOT to be sure it won't blow up in the air!

Fast Fire-Charge Cannon:
Compact, fast and easy to build, shoot fire charges (or arrows) from a dispenser very fast.

Direct Player Launcher:
Shot the player up about 150 blocks - if the player (or mob) will get launched by this machine if he will fall back he will fall exactly on the block he was standing before!
It uses lots of TNT.
The best use of it is to get up to a hidden structures in the sky, if you have a ladders to there everybody can see it, but if it's too high to see it and the way up is using this machine from under the ground (with a hole of one block that opens only when the player launched up) no one will find it. (The best thing to hide in the sky is the TNT bombard machine)

Arrows-On-Fire Dropper:
Can be used like the TNT bombard machine - from the sky. it can't cause a big damage, almost never useful but if you make it bigger it can be used as TNT bombard that kills players but don't cause any damage to buildings.

Short-Distance Massive TNT Artillery:
Not Recommended to build on high place - the TNT may blow up in the air.
Used to cause a big damage to buildings (and walls) that can't be fixed fast.

Additional Notes