#1 Spanish conquered Mexico because guns and horses = white man's magic = wmm.
#2 Spanish conquered Mexico because Native Allies = white man's political shennanniggans = wms.
#3 Spanish conquered Mexico because a bit of column A and a bit of column B
#4 Spanish conquered Mexico because shit Aztec magic = szm. Aztecs sacrificed 30.000 people per day to keep the Sun shining. Of course the subject nations rebelled. It was inevitable.