As the world reels from US President Donald Trump's tariffs onslaught, here is a look back at some major trade wars since the 19th century ... In the second Opium War, from 1856-1860, Britain ...

During the 19th century the British fought minor wars in ... The Sudan in 1898. The Aro War in Nigeria in 1901-02. The Maxim gun became so renowned, it even featured in poems.