Order of battle at the Battle of Rain

The following units and commanders fought in the Battle of Rain.

Swedish Army
King Gustav II of Sweden

Infantry

 * Hand Infantry Regiment (Swedish)
 * Hand Infantry Regiment (Swedish)
 * Second Infantry of the 3rd Regiment (Danish)
 * Hastger Infantry Regiment (Finnish)
 * Royal Guard Coy (Mixed)
 * N. Brahe Infantry Regiment (German)
 * Winckel Infantry Regiment (German)
 * Thurn Infantry Regiment (German)
 * Baner Infantry Regiment (German)
 * Bernard Saxe-Weimar Infantry Regiment (German)
 * Burt Infantry Regiment (German)
 * Chemnitz Infantry Regiment (German)
 * Forbes Infantry Regiment (German)
 * Horn Infantry Regiment (German)
 * Kagge Infantry Regiment (German)
 * Kanoffsky Infantry Regiment (German)
 * Liebenstein Infantry Regiment (German)
 * Mitschefall Infantry Regiment (German)
 * Mitzlaff Infantry Regiment (German)
 * Monro of Fowles Infantry Regiment (German)
 * Riese Infantry Regiment (German)
 * Schaffalitsky Infantry Regiment (German)
 * B. Schlammersdorf Infantry Regiment (German)
 * T. Schlammersdorf Infantry Regiment (German)
 * Schneidwinds Infantry Regiment (German)
 * Truchsess Infantry Regiment (German)
 * Wildenstein Infantry Regiment (German)
 * Hepburn Infantry Regiment (Scottish)
 * Mackay Infantry Regiment (German)
 * Spens (German)

Cavalry

 * Stenbock Cuirassier (Swedish)
 * Soop Cuirassier (Swedish)
 * Silversparre Squadron (Swedish)
 * Sack Squadron (Swedish)
 * Sperreuter Squadron (Swedish)
 * Stålhandske Cuirassier (Finnish)
 * Tesenhaussen (Livonian)
 * Domhoff Squadron (Kurland)
 * Baudissin Cuirassier (German)
 * B. Saxe-Weiver Cuirassier (German)
 * Horn Cuirassier (German)
 * Kotchtitzky Cuirassier (German)
 * Baden Cuirassier (German)
 * Monro of Fowles Cuirassier (German)
 * Schonberg Cuirassier (German)
 * Soms Squadron (German)
 * Sperreuter Cuirassier (German)
 * Streiff Squadron (German)
 * Tott Cuirassier (German)
 * Truchsess Cuirassier (German)
 * Uslar Cuirassier (German)
 * Wedel Cuirassier (German)
 * W. Saxe Weimer Cuirassier (German)
 * Ohm Cuirassier (German)
 * Horn Leib Coy (German)
 * Du Menys Dragoon (German)
 * Taupadel Dragoon (German)

Holy Roman Empire – Catholic League Army
John Tserclaes, Count of Tilly

Infantry

 * Alt-Till Infantry Regiment (Catholic League-Wurzburg)
 * Reinach Infantry Regiment (Catholic League-High German)
 * Comargo Infantry Regiment (Catholic League-High German)
 * Pappenheim Infantry Regiment (Catholic League-High German)
 * Wahl Infantry Regiment (Catholic League-High German)
 * Jung-Furstenberg Infantry Regiment (Catholic League-High German)
 * Free Companies Infantry Regiment (Catholic League-High German)
 * Beck Infantry Regiment (Imperialist-Walloon)
 * Conteras Infantry Regiment (Imperialist-German)
 * Savelli Infantry Regiment (Imperialist-Low German)
 * Witzleban Infantry Regiment (Imperialist-German)
 * Baldiron Infantry Regiment (Imperialist-Spanish)
 * Fahrenbach Infantry Regiment (Imperialist-High German)
 * Rittberg Infantry Regiment (Imperialist-German)

Cavalry

 * Cronberg Heavy Cavalry (Catholic League-High German)
 * Billehe Heavy Cavalry (Catholic League-High German)
 * J. Fugger Cuirassier (Catholic League-Low German)
 * Blankhart Cuirassier (Catholic League-Low German)
 * D'Espagne Cuirassier (Catholic League-Low German)
 * Cratz Cuirassier (Catholic League-High German)
 * Hasslang Cuirassier (Catholic League-High German)
 * Merode Cuirassier (Catholic League-High German)
 * Free Coy (Catholic League-High German)
 * Dragoons (Catholic League-High German)
 * O.H. Fugger Croats (Catholic League-High German)
 * Merode Arquebussier (Imperialist-Walloon)
 * Bucquoy Heavy Cavalry (Imperialist-Walloon)
 * Free Coy (Imperialist-High German)
 * Croats Light Cavalry (Imperialist-Croatian)