As reported on its social media profile by the 10th Armored Cavalry Brigade in Świętoszów:

On September 5, 2022, several dozen volunteers from various regions of the country passed through the gates of the 10th Armored Cavalry Brigade in Świętoszów to serve as part of Voluntary Basic Military Service (DZSW).

More information about voluntary basic military service can be found, among other places, on the website of the Ministry of National Defence.