"use of fireforge for 13th century" Topic

I have 2 boxses of mounted sergeants and one of foot sergeants

These seem to fit well with tge 13th c. With tge kettle helmets ect. But the templar boxes, seems very 12th c. With the headgear. Especaly the knights, very few great helms, and tge infantry dosnt have any kettle helmets. That I can see.

Medieval fashions weren't as cut-and-dried as that. The nasal helm continued in use after the bucket helm appeared. If I was fighting in the heat of the holy land I'd probably prefer a nasal helm – better visibilty too. Fireforge's Templars are fine up to at least 1250AD I would say.

I wasn't going to use them for the crusades, atleast not for this project. But western/northern europe

Frankly (almost a pun hehe), there is no hard and fast rules concerning helmet use, much less anything else. It's like any other pre-Industrial Age period – there is the core that might have looked exactly like we think it did and then there are the great unwashed rest who picked up whatever was available.

Frothers is absolutely right, but the later you set your army, the greater proportion of more 'up-to-date' armour, hopwever that chiefly applies to the men-at-arms. A padded jacket, protective gloves and a simple helmet for the infantry underwent little change, so the figures you use for the early 13th C will largely be fine for the early 14th Century. This is much less the case for men-at-arms. Medieval writers and legislators sadly did not leave us strict definitions of requirements but there again they did not really have to do so; everyone was aware of the standards required and that standards had changed considerably between 1200 and 1300. In a sense it was a hedge against inflation for lords and kings. The standards change, but the level of obligation did not. A landholder obliged to give 'the service of one knight'had to invest rather more in kit and horseflesh in 1300 than was the case a hundred years earlier. In 1200 barding for horses was relatively rare and not obligatory, in 1300 they were de rigeur if you wanted your full pay.
Increasing requirements was what led to paying 'regard' to supplement the traditional wage rate….12d a day for men-at-arms and 24d a day for knights, though the actual equipment burden and nature of service was the same for both. As ever, Anne Curry, Andrew Ayton and Michael Prestwich should be your starting point for research.