Are hornets, wasps and yellow jackets three separate species?

Question

Are yellow jackets and hornets types of wasps, or related but different insects?

It's common knowledge that ants routinely go to war with other ant colonies/species, but do bees and wasps typically try to take over each other's nests (honey)?

Answer 1

absolutely!

of coursse

Answer 2

yellow jackets are a species of wasps

Hornets are a certain type of large wasp with many species found worldwide