What is Idle War Heroes - Tank Tycoon, and how do you play it?

This is a free Idle War Heroes - Tank Tycoon game for Android devices, in which you can take over the role of an idle person who has a tank and some soldiers and wants to expand his empire and become a military tycoon.

If you have played any war games, you will know how this works. You start off with a base and you need to build and upgrade it, so you can get more gold. The way to do that is to send your units to fight the enemies and get gold, as well as items. You can also find and collect new tanks and units.