Accessory: H&M Hex Tilesheet 1
$10 per tilesheet.
The expansion Horse & Musket: Crucible of War has two scenarios that use more woods tiles than are in the base game. Many of the hexes in question will not see play, and it is entirely sufficient to use the provided square "woods counters" to mark the borders of these regions. But, if you really want to have a woods hex tile for every woods hex in those two scenarios, purchasing five sheets of Tilesheet 1 will allow you to do that.
Again, it's totally not necessary! You can easily play those scenarios without purchasing additional tiles!But, if you really want them, well, here they are.