In the 1930s, since about 1934, Czechoslovakia was building bunkers at the border with Germany and Austria. People called them "Řopík". "Řadové opevnění". They had various slogans on them. but one that stuck in my mind was "Byli jsme a budem". "We have been and we will be." You can see it here, about 10 secpnds in here:https://www.youtube.com/watch?v=516WY2tf8AE

In the 1930s, since about 1934, Czechoslovakia was building bunkers at the border with Germany and Austria. People called them "Řopík". "Řadové opevnění". They had various slogans on them. but one that stuck in my mind was "Byli jsme a budem". "We have been and we will be." You can see it here, about 10 seconds in.