From Riehn
Approx strength Russian Army on or near Aug 6. (p214)

Both armies were united at this point

First Army

II Inf Corps Bagavout         13,000
III Inf Corps Tutshkov I      13,500
IV Inf Corps Ostermann        9,500
V Inf Corps Lavrov            17,500
VI Inf Corps Doctorov         12,500
I Cav Corps Uvarov            3,700
II Cav Corps Korff II         1,200
III Cav Corps Pahlen          2,100
Platov's Cossacks             4,700

Second Army

VII Inf Corps Raievsky        13,000
VIII Inf Corps Borosdin I     15,400
27th Inf Div Neverovsky       7,000
IV Cav Corps Sievers          4,000
Cossacks                      3,300