IHT: We do have 50% of the population and 58% of the land. I rush build an army.
IT: Still a lot of troops entering our lands. And 4 units land near Hattusas.
Turn 1 (1360 AD) A couple of Iroquois units redlined. Cav army takes out 4 infs. 2nd cav army takes out 2 infs and 1 guerilla. 3rd cav army kills 2 infs and 1 cav. Cavs kill 3 infs, 1 guerilla, 1 rifle and 2 cavs. Cav army and 4 other cavs are sent to Iroquois lands to pillage. [17-3]
IT: Another SoD of the Iroquois comes. I can't do anything else than kill them. So no progress, except for the cav army pillaging their lands.
Turn 2 (1365 AD) The only healed cav army kills 3 cavs in a SoD after redlining about 15 infs. I decide to let those infs go and heal our troops. The only dyes of the Iroquois pillaged. [20-3]
IT: A small number of Iroquois units enter our lands. The rest retreats. The Iroquois have transports (Combustion. Oil)
Turn 3 (1370 AD) 39 artillery can be made available for the siege of Isandhiwana (size 20). Army rushed.
IT: The transport carried... 1 cav
Turn 4 (1375 AD) 4 infs and a cav redlined and civil defense destroyed in Isandh. A cav army takes out 4 infs and an elite cav kills a cav to
take Isandh.
Artillery at home redlines the most dangerous invading troops of the Iroquois. Cav army takes out 2 infs, 1 guerilla and 1 cav. Another cav army kills 4 cavs.
15 artillery and a SoD of cavs and cav-armies move to Santiago. [33-3]
IT: The Iroquois send 13 units to Isandh. And two cavs retreat vs infs in that city.
Turn 5 (1380 AD) We faill to redline 2 of the 6 infs in Santiago. 5 cav armies and a lot of other cavs kill 6 infs, 2 guerillas and 2 cavs. We lose 8 cavs
But we take Santiago.
Iroquois troops near Isandh are redlined and I assume they will retreat. An inf in our territory killed. [44-12]
IT: One killed Irqouois cav in the counterttack. [45-12]
Turn 6 (1385 AD) Consolidation turn. I rush an army and redline all Iroquois troops close to our borders. I also pillage their route to Isandh.
IT: The Iroquois have bombers

Three of them hurt our infantry in Santiago and that's why we see an Infantry killed by a cav. We manage to kill 4 cavs of the Iroquois, but our army is redlined... They also land 4 units in our core [48-13]
Turn 7 (1390 AD) Artillery redlines and cav army kills 2 infs and 2 cavs in our core. 5 cav armies and 2 cavs kill a total of 14 infs and a cav. We lose a cav. Troops move to Eridu. [64-13]
IT: 4 bombers target an army and Santiago. We lose an inf and the Iroquois a cav near Santiago [65-14]
Turn 8 (1395 AD)
Eridu only has 3 infs. After redlining them a cav army takes out all three. We immediately press forward towards Valencia.
The 8 units in our core are relined and killed by a cav army and 6 cavs. We lose a cav there. 3 elite cavs take out 2 cavs and an inf. Finally we get a
leader. This will be another cav army. [79-15]
Army rushed.
IT: 11 bombers do damage to Toledo. So nothing worrying because that town is hardly strategic. We can't build another army (not enough cites

)
Turn 9 (1400 AD)
Valencia's 3 infs are redlined and then killed by an army. We take the city. 4 armies are needed to take
Tyendanaga and kill four infs. Three elite cavs kill two infs, one dies.
We have enough cities to switch Kyoto back to an army. [88-16]
I like this round number so I end my here. We have 64% land and 58% population. We need 25 tiles to get the territory needed. We will get that in 20 turns peacefully (throughborder expansion). The Iroquois only want to give us 1 city (Tiensin) and flip risks are too big to go a peaceful route now... The population is another story and those bombers are very annoying. Not to mention the tanks that MAY appear fast. This means that we have to be quick. Should be possible with 9 cav armies (and 10 next turn).
EDIT: I largely ignored the invading Iroquois military after bombing them to 2HP or less. They then will retreat and allow us to focus on more pressing matters. Winning

Also: as soon as we have two more cities we'd better raze the rest. We then only have to get their pop down and recapture flipped cities. Although we may have enough workers and slaves to join.