Yup, the Fenian Raids, Ambela and the Maori Wars are the obvious ones but only if you pick the ones in frocks and forage caps. At a pinch you could use the same figures for the Abyssinian Campaign as the serge frocks were used for part of the campaign of but you’d actually be better off using the old Perry sculpted Foundry range for China in airpipe helmets. They could be used to supplement the Foundry figures for China as well onbviously enough (2nd Opium War).
If you want alternative something that’s a bit more than pure fantasy, there’s always the ‘Pig War’ of 1859 which actually did see an armed stand-off between Britain and the US in the waters off British Colombia. Britain landed Royal Marines and the US sent a battalion. Could very easily have ended in tears.