Clan War League demands a different mindset than regular wars. In CWL, every star across all 7 war days counts toward promotion, and you face the same opponents repeatedly. This TH9 CWL War Base (15v15) is designed for the competitive CWL environment where attackers have time to scout and plan, requiring a layout that remains strong even when the opponent knows your trap positions.

CWL bases should prioritize anti-2-star over anti-3-star when facing higher Town Hall opponents. In mismatches, preventing even 2 stars from a stronger attacker is more valuable than the rare 3-star defense. This layout keeps the Town Hall deeply protected with maximum defense overlap, making it extremely difficult for even a TH10 to secure the Town Hall.

Unlike regular wars, CWL doesn't allow base changes between attacks on the same day. Choose your CWL base carefully at the start of the season and stick with it. This layout has been tested across multiple CWL seasons and performs consistently because its defensive strength doesn't rely on surprise trap placements — the compartment structure itself is the primary defense.

Communication with your clan is essential for CWL success. Share this base layout with your clanmates so they can practice attacking similar designs. Understanding common anti-3-star layouts from the defender's perspective helps your clan develop better attack strategies for your own CWL offenses.