A Hero's gathering skill can make a resource point invincible and add resources.
I used to lump every "resource protection" message together. 🛡️ Then I saw one that said an enemy Hero's skill meant I couldn't attack a gathering point at all. That is a different decision from attacking a protected Town for no loot.
🎯 Contested Resource Points
When you march toward a resource point that another Lord is also approaching, the game warns that continuing may start a battle. That warning is about a possible clash, not proof that the other Lord has already occupied it.
🦸 Gathering Skill Protection
A Hero skill description names two effects while gathering: the resource point becomes invincible, and gathering yields additional resources. It does not give a duration here, so check the active skill before you count on protection.
🚫 Attacks Blocked
The attack warning is blunt: an enemy Hero has used a resource protection skill, and you cannot attack. It does not offer the choice to continue that you get when a Town's resources are protected.
A warning that someone else is marching toward a resource point says a battle may occur. An active gathering protection skill changes the choice: if the attack is blocked, pick another target instead of sending troops there. Would you change targets after that warning? 🤔