I'd never heard the British part. But it makes sense that there would be a bit of heart burn as we were contesting their claims to Oregon. Prevailing opinion was that Mexico would win the war. One of the reasons the Mexicans didn't was the fact we had better artillery and we were starting to deploy troops by rail and by steam ship. Still Santy Anno is a great song and I sing it frequently at Civil War re-enactments etc. Kindet regards, Neil