Switzerland invaded Liechtenstein, but Liechtenstein didn’t know

Liechtenstein was accidentally invaded by Switzerland. Liechtenstein had no clue this was going on; they have no military. Liechtensteiners came to know about it when the Swiss army apologized to them for invading. The border between Switzerland and Liechtenstein is open and totally unmarked. As such, there have been several incidents in history where the Swiss military has accidentally entered Liechtenstein territory.

The most famous incident was in 2007, when 171 Swiss soldiers took a wrong turn in bad weather and wound up in Liechtenstein. They didn’t get more than 2 kilometers into Liechtenstein before they realized their mistake and turned back. No one in Liechtenstein was even aware that this had happened until the Swiss notified them to apologize.

The Liechtenstein government shrugged it off, saying, “It’s not like they invaded with attack helicopters. No problem, these things happen.” In both 1968 and 1985, artillery shells launched by Swiss troops landed within Liechtenstein. In either case, no one was harmed.