The polar bear is the biggest land carnivore but whether it is the most dangerous is not really known. Brown bears are only slightly smaller but are preyed upon by Siberian tigers. My guess would be that the most dangerous and most feared land carnivore is...man.
Most feared a... wolves most dangerous honey badger
No!
The unattended land mine, of course!
The world's most dangerous carnivore is often considered to be the saltwater crocodile. Known for its size, aggression, and powerful jaws, it is responsible for attacks on humans in regions where it is found, such as northern Australia and Southeast Asia.
The most dangerous prehistoric species is that of Dinosaurs. The dinosaurs can be carnivores or herbivores. If the carnivores were alive, by now they would have eaten a large number of animals and human beings. Such a carnivore is Velociraptor. The herbivores are no danger for us.
The great white shark is a carnivore. It lives on fish, seals, turtles, etc
mambas and camo spiders are some of the most feared.
There are several land animals, but probably the most feared is the lion. To this day, it still remains at the top of the food chain in both Africa and Asia.
Most herbivores were very large so a carnivore would not attack it unless it was young, sickly, or separated from his/her herd. Others who did not have the size advantage usually had things like dangerous sharp horns, spikes, or armor to protect them. If a small carnivore was hunted by a larger carnivore then that is a different story. The smaller carnivore would have to quick and clever to get away.
On land the danger colours are yellow and black - in the ocean, it is blue coloured patterns that denote danger.
The Roman senate and the patricians (the aristocracy) feared Caesar the most.
It depends on what war you mean. Bombs, nuclear to be precise, were some of the most feared weapons. Tanks also were feared highly.