In general, a well-aimed shot from a skilled archer using a strong longbow can penetrate thinner or lower-quality chainmail at closer ranges. Chainmail is the armor of small metal rings linked together to form a protective layer. While a longbow can undoubtedly penetrate chainmail, it ultimately depends on several factors. The strength and skill of the archer The quality and thickness of the chainmail The distance between the archer and the target However, thicker or higher quality chainmail may withstand the force of a longbow shot even at shorter distances. Ultimately, it is essential to remember that the longbow was not the preferred weapon for penetrating armor during medieval times. Weapons such as crossbows and guns were more effective at piercing through armor, while you can use the longbow for its speed and accuracy in hitting targets from a distance.