Some additional general histories:

[Bodart, Gaston, _Militär-historisches Kriegs-Lexikon (1618-1905)_, Wien und Leipzig, 1907.](https://archive.org/details/bub_gb_Eo4DAAAAYAAJ)
[and here](https://archive.org/details/bub_gb_A0kNAAAAYAAJ)

Of course, the well known:

__Wrede, Alphons, _Geschichte der K. und K. Wehrmacht_, Wien, 1898-1905__

[Band 1 (1898)](https://books.google.com/books?id=5J8PAQAAIAAJ) [and here](https://archive.org/details/geschichtederkun00wred)

[Band 2 (1898)](https://books.google.com/books?id=-58PAQAAIAAJ)

[Band 3, 1. Helfte (1901)](https://books.google.com/books?id=vKwPAQAAIAAJ)

[Band 3, 2. Helfte (1901)](https://archive.org/details/geschichtederku00wredgoog)[and here](https://books.google.com/books?id=7PIRWVeafywC)

[Band 4, 1. Helfte (1905)](https://books.google.com/books?id=GK0PAQAAIAAJ) [and here](https://books.google.com/books?id=22VMAAAAYAAJ)

[Band 5 (1903)](https://books.google.com/books?id=xpg_AQAAMAAJ)

Brancaccio, Nicola, _L'Esercito del vecchio Piemonte 1560-1859: sunti storici dei principali corpi_, Roma, 1922.
Could not find a full view edition if this.

Costa de Beauregard, Joseph, Henri, _Mémoires historiques sur la maison royale de Savoie et sur les pays soumis à sa domination depuis le commencement du onzième siècle jusqu'à l'année 1796 inclusivement_, Turin, 1816.

1er Edition

[Tome 1](https://gallica.bnf.fr/ark:/12148/bpt6k65375872.r)
[Tome 2](https://gallica.bnf.fr/ark:/12148/bpt6k6537489j.r)
[Tome 3](https://gallica.bnf.fr/ark:/12148/bpt6k6537416n.r)
[Tome 4](https://gallica.bnf.fr/ark:/12148/bpt6k96487023.r)