The SI event mentions the Incas using "Thunder Sticks" and the Aztecs only holding them back with their newly-acquired Cavalry (and, presumably, metalsmithing/siege techniques). Still though, people don't give the Aztecs a lot of credit for their technology, which was really quite good - just somewhat lacking in metallurgical skills. With some luck, they could have beaten Cortez - or rather, less luck on his side. That said, it's not hard to code in an Aztec Cultural Building.
Code:
ca_culture_mesoamerican_1 = {
potential = {
FROM = { culture_group = mesoamerican }
}
prerequisites = { ca_wall_2 }
build_cost = 200
build_time = 730
light_infantry = 20
heavy_infantry = 20
light_infantry_offensive = 0.075
heavy_infantry_offensive = 0.075
ai_creation_factor = 101
start = {
AND = {
year = 1066
has_building = ca_barracks_1
}
}
}
ca_culture_mesoamerican_2 = {
potential = {
FROM = { culture_group = mesoamerican }
}
trigger = { TECH_CASTLE_CONSTRUCTION = 1 }
upgrades_from = ca_culture_mesoamerican_1
build_cost = 300
build_time = 1095
light_infantry = 30
heavy_infantry = 30
light_infantry_offensive = 0.075
heavy_infantry_offensive = 0.075
ai_creation_factor = 101
start = {
AND = {
year = 1120
has_building = ca_barracks_1
}
}
}
ca_culture_mesoamerican_3 = {
potential = {
FROM = { culture_group = mesoamerican }
}
trigger = { TECH_CASTLE_CONSTRUCTION = 2 }
upgrades_from = ca_culture_mesoamerican_2
build_cost = 400
build_time = 2190
light_infantry = 40
heavy_infantry = 40
light_infantry_offensive = 0.075
heavy_infantry_offensive = 0.075
ai_creation_factor = 101
start = {
AND = {
year = 1183
has_building = ca_barracks_1
}
}
}
ca_culture_mesoamerican_4 = {
potential = {
FROM = { culture_group = mesoamerican }
}
trigger = { TECH_CASTLE_CONSTRUCTION = 4 }
upgrades_from = ca_culture_mesoamerican_3
build_cost = 500
build_time = 2190
light_infantry = 50
heavy_infantry = 50
light_infantry_offensive = 0.075
heavy_infantry_offensive = 0.075
ai_creation_factor = 101
start = {
AND = {
year = 1219
has_building = ca_barracks_1
}
}
}
Just drop this into 00_buildings.txt in the castle section. Buffs light infantry and heavy infantry in the same way as the Aztec Retinue, and provides some as well. I went with culture_group = mesoamerican, but you could replace that with culture = nahuatl if consistency with the Retinue matters to you.
You'll also need this dropped in a .csv in localization
Code:
ca_culture_mesoamerican_1;Small Jaguar Lodge;FRENCH;GERMAN;;SPANISH;;;;;;;;;x
ca_culture_mesoamerican_2;Medium Jaguar Lodge;FRENCH;GERMAN;;SPANISH;;;;;;;;;x
ca_culture_mesoamerican_3;Large Jaguar Lodge;FRENCH;GERMAN;;SPANISH;;;;;;;;;x
ca_culture_mesoamerican_4;Great Jaguar Lodge;FRENCH;GERMAN;;SPANISH;;;;;;;;;x
I didn't include french/german/spanish translations because I don't speak any of them well enough to be confident, but it's not hard to add.