From the Main Menu, Select
Basic Training and then select
Practice RangeOnce in Press
to create an Infantry Squad.
Select
Officer, spawn in on any spawn point and then pause and click
Redeploy.
After the 3 second call down, press
to change your role and select
Rifleman.
Repeat the process for all the Infantry units.
(
Officer, Rifleman, Assault, Automatic Rifleman, Medic, Support, Machine Gunner, Anti-tank & Engineer)
Once you've gone through all infantry, Redeploy and press
to leave the infantry unit.
Press
and select the Armour unit and select
Tank Commander, spawn in and redeploy as a
CrewmanAs above, leave the armour unit and select the Recon squad and spawn in as a
Spotter. Redeploy and spawn in as a
Sniper and the achievement will unlock.