Many of you may not realize, but this does actually reference historical events. There are only a few countries the UK has not invaded/had a war with (Andorra, Belarus, Bolivia, Burundi, Central African Republic, Chad, Congo, Republic of, Guatemala, Ivory Coast, Kyrgyzstan, Liechtenstein, Luxembourg, Mali, Marshall Islands, Monaco, Mongolia, Paraguay, Sao Tome and Principe, Sweden, Tajikistan, Uzbekistan, and Vatican City) however this also references The Pig War, which was a war that almost broke out between UK and USA in 1859 over a border dispute and hunting rights. I don’t know much about it, but I think Oversimplified made a YouTube video on it, and if you want to learn more, here’s an article. https://www.atlasobscura.com/articles/pig-war-british-american-border-dispute-san-juan-island