Longbow is a odd mix of B&D with Fixed Force. I call it Fixed Forced because not only does the AI have zero ability to gather resources, the total resources on the map are so limited you will be seriously cramped in how many units you could eventually make. Its functionally a B&D but the enemy is limited to 10k resources of each.
Its a dark age start with the enemy in post-imperial. You will need to make villagers from scratch and it takes awhile to build up. Meanwhile your nearly pop-capped by the starting army, which will need to be deleted to make room for more units. After that its a long wait to tech up and max out, with no enemy attacks. To win, you can simply advance using longbows, like the scenario title implies. Its a great unit with its 12 range to efficiently kill enemy units without being in danger, so despite the maps low resources you can whittle them down easily enough. Its worse than a random map. The AI doesnt react even to attacks on their town.
Your only gold and stone is surrounded by a thick woods, which you cant break easily, being britons.
The enemy force starts strong, but doesnt come after you. Your in no real danger of losing, possessing a massive fortress with rings of towers. Once you get longbows out and start whittling down the enemy, they have no answers. Its too hard at the start to try attacking them, tedious to build up to imperial, and a cakewalk to finally win.
If the resource limitations was made that way on purpose, its atleast an attempt to make something a bit different from a random map.