Daga tsakanin 1815 zuwa 1914, wani lokaci da wasu masana tarihi suka kira "karni na mulkin mallaka" na Burtaniya, kusan 10,000,000 square miles (26,000,000 km2) na yanki da kuma kimanin mutane miliyan 400 aka kara wa Daular Burtaniya. Nasara a kan Napoleon ta bar Burtaniya ba tare da wani babban abokin hamayya na kasa da kasa ba, ban da Rasha a Asiya ta Tsakiya. Ba a yi jayayya a teku ba, Burtaniya ta ɗauki matsayin ɗan sanda na duniya, halin da ake ciki daga baya da aka sani da Pax Britannica, da kuma manufofin waje na "keɓewa". Tare da ikon mallakar mulkin mallaka da ta yi a kan yankunanta, matsayin mulkin mallaka na Burtaniya a cikin cinikin duniya yana nufin cewa yana sarrafa tattalin arzikin ƙasashe da yawa, kamar China, Argentina da Siam, wanda wasu masana tarihi suka bayyana a matsayin "al'amuran yau da kullun".
Zaman Lafiya na Britaniya