How can I use trenches to slow down enemy movement during raids?

Trenches are a highly effective defensive tool in Valheim, especially during raids, as they slow down enemy movement and funnel attackers into predictable paths. To create a trench, you will need a pickaxe, which can be crafted using 10 wood and 1 hard antler (dropped by Eikthyr, the first boss). Trenches work by creating a physical barrier that most enemies cannot cross, forcing them to take longer routes or gather at specific points where you can focus your defenses.\n\nTo build a trench, start by selecting a flat area around your base. Use the pickaxe to dig a trench at least two meters deep and wide enough to prevent enemies from jumping over. The depth is critical because some enemies, like Trolls, can step over shallow trenches. For maximum effectiveness, extend the trench in a wide circle or rectangle around your base, leaving only one or two narrow entry points. These entry points can be fortified with walls, spikes, or ballistas to create kill zones.\n\nOne common challenge is dealing with flying enemies like Drakes or Deathsquitos, which are unaffected by trenches. To counter this, pair your trench defenses with elevated structures like watchtowers or platforms where you can use bows or ranged weapons to take down airborne threats. Additionally, placing workbenches or other crafting stations near your trench can prevent enemy spawns inside your base, ensuring that attackers are forced to approach from the outside.\n\nIn the Black Forest biome, where Greydwarfs and Trolls are common, trenches are particularly useful. Trolls, while powerful, are slow and predictable, making them easy targets when funneled into a narrow path. In the Plains biome, trenches can help manage Fuling raids by slowing their advance and giving you time to prepare for combat. However, be cautious of Lox, as they can destroy terrain and potentially breach your trench if not managed properly.\n\nFor new players, start with a simple trench design around your initial base in the Meadows biome. As you progress and face tougher enemies, expand and reinforce your trenches with stone walls or palisades. Experienced players can combine trenches with moats, drawbridges, or even layered defenses for added protection. Remember to repair your trenches after raids, as some enemies can damage the terrain.\n\nFinally, consider the aesthetic and functional balance of your trench system. While functionality is key, integrating natural terrain features like hills or rivers can enhance both the defense and visual appeal of your base. Trenches are a versatile and cost-effective way to protect your home, and with proper planning, they can make even the toughest raids manageable.\n\nPractical Tip: Always keep a backup pickaxe and repair materials nearby, as digging and maintaining trenches can be resource-intensive. Additionally, use the hoe to level the ground around your trench for a cleaner look and to prevent accidental falls during combat.