http://www.bayonetstrength.150m.com/Tac ... ations.htm
And it got me thinking on how I should handle small unit formations in my 40K fanfics, particularly after reading this page.
http://www.bayonetstrength.150m.com/Tac ... _squad.htm
Which, in summary, states that the usual WW2 squad was divided into three elements:
1) Squad Leader (command element)
2) Gun Group (has the squad LMG, which provides fire support / suppressing fire)
3) Rifle Group (the assault / maneuver element, which closes in on the enemy)
Now squads in Warhammer 40K aren't generally broken down with this level of detail (although some books state they split a ten-man squad into two smaller five-man squads), but I'm a pedantic bastard and want something more substantive for my own stuff.
The Guard unit I feature in my stories is the Brennus Mechanized, which is a rare all-mech regiment. Its smallest component unit is essentially what the tabletop calls an Veteran Armored Fist Squad, consisting of the following:
1) Chimera IFV (roughtly analogous to a modern-day Bradley or BMP), typically armed with multi-laser (25mm cannon analogue) and heavy flamer. Crew of two (one gunner, one driver) except for command vehicles, which gets the Lance (platoon) commander on top of the two crewmen.
2) Ten-man infantry squad, consisting of the following:
- Squad Sergeant
- 3x Grenadiers, armed with Grenade Launchers and Las rifle (although one GL may be replaced with a short-ranged melta).
- 1x Heavy Weapon Team (2 crewmen), typically a Lascannon
- 4x regular troopers with las rifles
(And yes, it really follows the tabletop orgs closely, with all of the bad implications it entails.

So I'm thinking to more closely mirror real-world deployments, there should be a "gun group" as well as a "Maneuver" group, divided as follows:
Gun Group: Sarge, 2 Grenadiers, Lascannon team, Chimera
Rifle / Maneuver Group : 1 Grenadier/Melta, 4 troopers
With the general idea being that the Chimera provides heavy suppressing fire, supported by the Grenadiers who are assigned to target specific strongpoints / MG nests. Meanwhile, the maneuver group performs the actual close assaults, led by the trooper with the melta.
=====
On reflection though, the current organization seems to be very light on automatic anti-personal firepower, so I was also thinking of alternate configurations. Possibly I could switch out the Lascannon for some squads and replace them with Heavy Bolters, giving a "Lance" (five Armored Fist Squads, roughly analogous to a platoon) three squads armed with heavy bolters, and two squads with lascannons for more balanced firepower.
What do folks think? Am I overthinking this, or should I go even further and look up the ladder with stuff like Company-level assets?