Perhaps it is supposed to represent a Templar who, after the Battle of Bannockburn of course, made his way to Livonia, and joined the Teutonic Order to take part in the crusade against the European pagans? Then again...
I thought that they might be representing the Hospitilars, but they also wore white with red crosses.
Hospitilars
However, I did find this image?
The Hospitallers wore black mantles with white crosses; the first image shows a Templar with the Order's banner, the Beauseant. The Hospitaller is the fellow on the right in the third image.
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