Mexican Fentanyl Cartels injuring the United States
British Opium Cartels injuring China
Britain was selling opium to China and causing a severe crisis of addiction within the country. In an attempt to put a stop to this, China ended up at war with Britain – twice. China already had prohibition against opium when the British began trading it, but that did not deter them. Consequently the prohibition simply led to British traders going as far as offering free samples of their product to entice new users
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China going to war to stop drug cartels from injuring China seems relevant to our current border issue