I have just recommended Niall Ferguson's The Pity of War on another thread, or there is Dreadnought by Robert K Massie, subtitled Britain,Germany and the coming of the Great War,: very readable.
Avatar is Colonel Frederick Burnaby ,a genuine Victorian hero.
"Now Horse Guards Blue, both old and young
Each man from front to rear,
Remember Colonel Burnaby
At sandy Abu Klea !"