Which civilizations, if any, stole technology from their opponents and improved upon it and/or successfully used it against them?

by Kevin5953
[deleted]

This question is a "throughout history" type question, which is not allowed here. They tend to invite lots of short, speculative answers. If you want to rephrase your question to narrow it to a particular time period or region, feel free to repost it. But as written I'm afraid I have to remove it.