I make out … you ’re opine , “ Caltrops ? WHAT THE HECK IS A CALTROP ? ? ? And why is David The Good still going on and on about weird ancient weapons ? Even on this beautiful Monday ? When will he talk about gardening again ! ” Do n’t worry … I ’m almost done . I ’ll get back to plant life before long . If things collapse , you ’re gon na have to protect your watermelon , correct ? Right !
The water chestnut is a wicked little antipersonnel machine which , unlike bows and atlatls , is a defensive attitude rather than offensive weapon .
A water chestnut is simply a multi - pointed metallic element adept which , when thrown on the ground , will always have at least one spike sticking upwards .

Ouch !
Originally develop millennia ago to defeat horses , chariots and soldiers , the caltrop is now quite ready to hand in knock out machine and other vehicles with pneumatic tires .
They ’re evensold as “ road stars ” on Amazon .

Ouch!
If civilization collapsed and you wanted to shut down off your neighborhood to vehicular traffic , why go through all the fuss of creating an one-time - fashioned pile of burning tires ? Just go ahead and make some of these babies out of welded nail , burn off the heads and focus all the point and you ’ll be knocking out cars of gangbangers in no meter .
Then you may pick them off with your 50 - cent arrows .
In improver to tires , caltrops also wrack foot . These would be really effective if scatter on paths leading to your attribute … you ’d just have to think of where they were and NOT allow your kids play there . If used , it would really only be a good idea to deploy water chestnut in an pinch or in an area where there are already plenty of “ no trespassing ” mansion to monish off mushroom hunters or birdwatchers . They would be like go out landed estate mines behind .

And again , ouch .
If you were out of townsfolk , you could also put ’em on your driveway to maintain from thieves ( or at least get some payback ) .
Caltrops are mean , mean , mean .
And with that , I conclude my independent Seth of Post on crude weapons system .
Though I may sneak one more post in on the topic since I just get this in the mail today :
Latex surgical tubing . Very strong and stretchable .
What in the WORLD could one make with that ?