If this interests you, then you might like to check out Samalas eruption. Krakatoa eruption has a Volcanic Explosivity Index(VEI) of 6, 1257 Samalas eruption[1

If this interests you, then you might like to check out Samalas eruption. Krakatoa eruption has a Volcanic Explosivity Index(VEI) of 6, 1257 Samalas eruption[1] has VEI of 7 apart from massive death toll, the resulting ecological disaster is now expected to have played a major role in ending the Mongol empire and collapsing several others in Asia. Severe droughts, famine followed up by extraordinary rains during this period has been recorded throughout the world. I personally believe that's what lead to the end of Chola Dynasty(A Tamil empire spanning Southern India and SE Asia from 3rd BCE to 1279 CE)[2]. Although academic texts generally attribute to the end of Chola empire to the victory of long rival Pandya empire in wars, it's a common knowledge among Tamil people that it was drought induced famine[3] which ended the Chola and such famines generally do give an edge to the rival empires leading up to wars. [1]https://en.wikipedia.org/wiki/1257_Samalas_eruption https://en.wikipedia.org/wiki/1257_Samalas_eruption [2]https://en.wikipedia.org/wiki/Chola_dynasty https://en.wikipedia.org/wiki/Chola_dynasty [3]https://www.jstor.org/stable/44140197 https://www.jstor.org/stable/44140197