Maybe it's different with a "nation". If a Frech national comes and builds some fences in Maine that stay for 10 years, can he claim they've moved the border of

Maybe it's different with a "nation". If a Frech national comes and builds some fences in Maine that stay for 10 years, can he claim they've moved the border of France? A little absurd, yes, but I'm not sure adverse possession applies so cleanly to state boundaries as people seem to be implying in a few HN threads...