Some East African countries wanted to impose tariffs on US exports, and were told that would mean losing duty-free trade with the US. Rwanda decided it was worth it to protect local industry. Stripped of all the paternalism and Trumpenfury, that's the whole story.
https://www.cnbc.com/2018/05/30/us-and-rwanda-trade-dispute-...
Some East African countries wanted to impose tariffs on US exports, and were told that would mean losing duty-free trade with the US. Rwanda decided it was worth it to protect local industry. Stripped of all the paternalism and Trumpenfury, that's the whole story.