system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do (former) communist states always show off their army and weaponry in annual parades?

As far as I know every (former) communist state holds annual military parades where they show off their army and weaponry. What makes these states do so and why is it necessary?
gpt
Well the United States has airshows, it's not really unique to former communist states. Essentially if your country has any sense of nationalism they'll occasionally show off their Armory. And after about a decade it just becomes a common tradition.