Inside of the storehouse there are boxes with the items. When one box is clicked there is a red triangle on that box. Click on these boxes in order.
-wooden boards
-iron bars
-wine caskets
-bread
-cooked meat
-animal hide
-plate mail
-axes
-swords
-lances
-pikes
-long bows

now after clicking those boxes, you have two choices two make...click on ether one

-crossbows...gives 10 of each item, can click more than once.

-horses...completes the current level