OpenRA - Red Alert Wiki

The Rifle infantry (sometimes called "rifleman") is the cheapest combative unit. It is strong against Infantry and weak against everything else. It can be very powerful and cost effective in large numbers. A large group of Infantry, mainly consisting of rifle infantry and Rocket Soldiers, is known as a Blob.

Shooting from the fog of war[]

A rifle man can shoot further than it can see. When combined with a unit with high visibility radius, such as a ranger or a hind, the rifle man will be able to see and shoot further at other infantry without them shooting back, because they cannot see it. (Unless they also have a unit with high visibility nearby). If done properly, from the enemy's perspective, shots will be coming from the fog of war.

Alternatively, a rifleman can be commanded to Force-Fire into the fog of war, where an enemy is suspected to be standing.