Assertion: castle's fortification | /r/HasProperty | first fortification objects
Facets:
Source sentences:
text: First military fortifications were constructed in Petržalka in 1934, by order of general Šnejdárek, being among the first fortification objects built on the area of Czechoslovakia after World War I. Second wave of construction commenced in 1937 which turned the defenses into a consistent fortification line.