[Non-Sequitur]

Happens all the time. But not so much in the 19th century. The usual conditions are that it must be for a public purpose and compensation must be paid.

So how about some recent examples then?

Seems to fit.

Hardly. Sumter was not the property of the confederacy so they couldn't exercise control over it.

[rustbucket]

So how about some recent examples then?

The US apparently liked the concept enough to make it into a law: Link

Hardly. Sumter was not the property of the confederacy so they couldn't exercise control over it.

Not according to the Confederate Constitution which was the law in place in the seceded states. US law did not apply, but you know that.