To me the photo suggests:
that it took place in the late 1930s.
When I see the tags it reminds me of what happened during the Holocaust, where Jews were "marked" by a yellow Star of David.
The children don't look happy.
They have some of their belongs with them so they could be moving and can only take with them what they can carry.
Hopefully this helped somewhat. If you need more help, just let me know.
