There’s been a lot of discussion on forums whether we should add an option of nato style counters for unit icons. Until this fiery dispute is resolved, here’s a handy unit icon reference chart with breakdown of all the unit types you can encounter in Unity of Command.
As you can see, the total number of different types is fairly small and learning to discern them should be a breeze, especially if you are familiar with historical uniforms of World War II. It’s worthy to note that similarly looking units tend to have similar or identical stats.
You can use this chart as a desktop wallpaper too, if you like it.