> One difference that does exist is military, where EU states can have a military (as far I know), but US states can not Even that is a little shaky, as histor

> One difference that does exist is military, where EU states can have a military (as far I know), but US states can not Even that is a little shaky, as historically there were organized state militias, which eventually evolved into the National Guard. Even now, the National Guard formations for each state are under the direct control of that state, rather than directly subordinated to the federal government.