Do infantry units stack in Endless Legend?

I'm having lots of trouble stacking some infantry units in my army to make room for other units. I know you can stack similar ranged units, but how about the infantry ?
Best Answer
All types of units (Infantry, Ranged, Cavalry, Support, Flying) can be stacked into a single army, regardless of how similar they are. Unit stacking is limited to 4 by default, but is increased with military technologies which give "+x unit slot(s) on empire". Tier II - Meritocratic Promotion, and Tier IV - Signal Corps both increase the limit by 2.
Note the unit stack limit circled in the image below (beneath the army list) and the infantry (Vinesnakes) in the army.
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How do you add units to an army in endless legend?
You can select individual units by left-clicking on their label (hold the left Ctrl keyboard key to select more than one unit),then right-click on the Adventure Map to move the newly created army to an adjacent tile.How do you transfer units in endless legend?
You can merge armies by moving one army into another if there's enough space to fit every unit (this can be increased with research later), alternatively you can manually move units between armies by selecting units and then pressing the "Transfer" button when directly next to another army.Endless Legend - Combat Guide Pt.3: Unit types
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Images: Kelly, Karolina Grabowska, Karolina Grabowska, Karolina Grabowska