Poland has been invaded so many times that you could forgive them for trying to get their own back. In late May, my sources tell me, Polish soldiers erected a border post near Pielgrzymow, a small town in southern Poland on the border with the Czech Republic as part of their temporary closure of the border to deal with the Covid-19 pandemic.
The actual border runs along a quiet country road. The Polish troops guarded their border enthusiastically, turning back Czech citizens attempting to visit their local church. The locals not unnaturally started to complain and the Czech embassy in Warsaw complained to their opposite number.
It turns out that the border point had been placed on Czech soil in error, or at least the Poles claim, and bowing to diplomatic pressure they repositioned, allowing the Czechs to go about their religious ceremonies undisturbed.
The two countries have some previous, fighting a seven-day war in the Silesia region in 1919 and the Poles annexing in 1938 an area around the city of Bohumin, but this seems to have been a genuine mistake.
Wars have been fought for less!