(edit: ergh I wasn't ready!!)
Humm where to begin?
RO is at most a company level game.
Both German and soviet Organizations changed over the war (more than once infact).
1941
German Rifle squad (foot)
Squad -10 men
7x K-98 rifles
1x MP-40
1x MG-34 MG
2x Side arms (the germans used a lot of diffrent types of pistoles durring the war)
platoon (49 men)
4x Squads
1x MP-40
4x K-98 rifles
3x side arms
1x 50mm mortar
Late 1943
Squad -9 men
6x K-98 rifles (with one or two semis if avalible)
2x MP-40s
1x MG-42 (or other type)
2x Side arms
1x Granade launcher
Platoon
3x squads
1x MP-40
4x K-98 rifles
2x side arms
Im not going get to much in depth on moterised units but needless to say thy had 2x MG-34/42s. armord squads where 10 and 8 men (1942 & 1944) and truck units where 12 and 10, both only had 1 SMG per squad.
Then theres Volks Grenadiers a platoon had 2 squads of 9 men armed with MP-40s or STG-44s (no MGs) and 1 squad armed with 2x MG-42s and 3x Rifle granadeds and the rest automatics.
Note Waffen SS units had the same equipment and organization (though early in the war thy had to make do with what ever thy could find.)
------------------------------------------------------------------
Soviet
1941 Squad -11 men
2x SMGs
8x Rifles
1x LMG
Platoon -39 men
3x Squads
1x SMG
3x Rifles
2x Side arms
1x 50mm Mortar
1942 squad (early) -9 men
1x SMG
1x LMG (only in half the squads)
7 or 8 Rifles
1942 squad (late) -9 men
1x SMG
1 or 2x LMGs
6 or 7 rifles
1942 platoon -40 men
4x Squads (2 or 6 LMGs depending on the time period.)
1x SMG
3x Rifles
1943 squad -11 men
1 or 2x SMGs
1x LMG
8 or 9 Rifles
Platoon -35 men
3x squads
1x SMG
1x rifle
around this time a large number of SMG units started showing up
thy varyed in orginazation but generaly had 3 squads of 8 or 9 men all armed with SMGs with a lone platoon commander with a SMG.
units formd from rifle units often held onto their LMGs though. (by mid 1944 most companys had atlest 1 platoon of SMGs and 2 of rifles. As well as a dedicated SMG company up at regiment level.)
sorce for all this comes from here
http://www.bayonetstrength.150m.com/index.htm