Starting in 2022, NATO and EU member Poland began building a large border wall in order to keep migrants from crossing from Belarus. At the time Belarus, which is closely allied with Russia, was alleged by Warsaw to be ‘weaponizing’ migrants. Warsaw says this has not only continued but has escalated.

Poland is now seeking more funds from the European Union to further strengthen and extend its fence and fortifications on the Belarusian border while presenting the project as an “investment into European security.”

https://www.zerohedge.com/geopolitical/investment-european-security-poland-unveils-new-fortifications-belarus-border

 

Apparently, building tall fences to protect citizens from illegal migrants is common practice around the world