P. 8. On the map, Illinois was admitted to the Union as a state in 1818, not 1819.
P. 87. Under Machine Guns, the Hotchkiss .37 mm should be 37 mm.
P. 88. On the Weapons Table, the AWt and RoF columns for Magazine Rifles have been transposed and should be switched back (e.g., Henry, .44 should have AWt 0.64 and RoF 1, etc.).
P. 128. Laborers is on p. 26, not 25.
Martial Arts is on p. 112, not 113.