In Lords Mobile Siege Durability research increases your siege engine health. It is found in the military tree.
There are 10 levels in total and once maxed it will have increased your Siege health by 135%. You need to have research Catapults before you can unlock this ability.
The table below has the resource cost and time to upgrade each level. It also shows the might and rewards granted. You can find out your times based on your own research boost by using our research calculator.
Siege Durability Research Requirements
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