What are caltrops?
Correct answer: Area denial weapons

Player #5684840
Frenchie619, Same. I had never heard of a denial weapon before.

Old Fool
Player #5684840, these days the military preferred ADW is mines, of course non-military people have differing opinions.

Jonesy
We have a weed called Caltrop which has spiny prickles on them

Lorraine
the Romans used them.

Miss Sue
Looked like a weapon to me.

Player #4237353
Caltrop is also a weed