According to Swiss daily Blick, the 170 infantry soldiers wandered just over a mile across an unmarked border into the tiny principality early Thursday before realizing their mistake and turning back.

A spokesman for the Swiss army confirmed the story but said that there were unlikely to be any serious repercussions for the mistaken invasion.

"Dreadfully sorry, didn't mean to interrupt breakfast." It's all part of a plot to unify the European banking system! Today Lichtenstein, tomorrow Luxemburg! It'll only take about a day...