Spiked Barriers are good at stopping Cavalry and Siege weapons

Caltrops are good at taking care of infantry men, such as Militia men, Pikemen or Swordsmen.  buy kingdoms of camelot gems  However, once cleared you will need a second line of defence.  Caltrops can be built earlier on in the game and do not need you to have a very high level of resources or other buildings.  So it is good to start out with these field defences.  I would recommend starting out with 2,000 Caltrops.

Spiked Barriers are good at stopping Cavalry and Siege weapons.  They are the second easiest resource to build.   buy kingdoms of camelot gems  I would recommend building 1,000 Spiked Barriers to start out with.

Once you have upgraded your Wall to a level 6, Blacksmith to a level 6 and your Fletching technology to a level 5 you will be ready to start building Crossbows. Crossbows will sit on your wall at the best vantage point to shoot at your enemies. These will really come in handy to take out any attacking forces that are able to get through your field defences. cheap kingdoms of camelot gems  To start out with I would recommend that you build 5,000 Crossbows. Beware, Crossbows will require a large amount of wood to build, so ensure that your Sawmills are able to produce a large amount of wood.