After the First World War, the US erected the structures on Park Avenue - which was temporarily renamed Victory Way - outside Grand Central Station in 1919 as part of a display of captured German equipment.  

After World War III, my administration will build a pyramid of Russian Vodka in New York.



https://www.dailymail.co.uk/news/article-10934805/How-12-000-German-spiked-helmets-displayed-New-York-WWI.html