What is Stamina and how do I get more

As you upgrade your anthill in The Ants you will unlock up to 4 March Units that let you send your ants to gather and attack in the world. Each March Unit has an amount of Stamina that is shown in the March Unit screen above each unit. The maximum that each Unit can have at any time is 100.

Every time you march your Units to attack or gather it costs a certain amount of durability so the number will go down. If the cost of a march is more than the durability you have left it will not let you do it. Think of it as energy that needs to be recovered to left the units operate.

The Stamina recharges over time, but if you are attacking enemies then you will use it up faster than it regenerates. To let it regenerate you just have to wait a while to let it increase again. Stamina will recover whenever it is below 100 so even if your march is out gathering it will increase.

Stamina recovery is slow. There is research you can do in the Evolution research trees for each of your March Units that will improve the speed of the recharge rate, Look for the 'Best Rest item that is towards the bottom of each of the trees.