I am assuming you are talking about the Soviet experience in Afghanistan prior to the US/NATO war in Afghanistan.
If you want to know more about Soviet tactics in Afghanistan and the reasons behind them I highly suggest reading The Bear went over the Mountain as it details the Soviet experience in Afghanistan. Chapter 4 specifically talks about their use of outposts.
Can recommend the title The Bear Went Over the Mountain: Soviet Combat Tactics in Afghanistan which consists of a series of first person accounts and vignettes of young Soviet combat officer accounts during the 1979-89 Soviet War in Afghanistan
https://www.amazon.com/Bear-Went-Over-Mountain-Afghanistan/dp/1304069451
For counterinsurgency there is The Bear Went Over the Mountain: Soviet Combat Tactics in Afghanistan
For guerrilla warfare there is War of the Flea: The Classic Study of Guerrilla Warfare, Small Wars, Faraway Places: Global Insurrection and the Making of the Modern World, 1945-1965 , The Other Side of the Mountain: Mujahideen Tactics in the Soviet-Afghan War, and Fangs of the Lone Wolf: Chechen Tactics in the Russian-Chechen War 1994-2009.
Would you really count Romance of the Three Kingdoms as historical?
https://www.amazon.com/Bear-Went-Over-Mountain-Afghanistan/dp/1304069451
One of my Company Commanders loaned me this back in the day.
Excellent book on the topic: The Bear went over the mountain. https://www.amazon.com/Bear-Went-Over-Mountain-Afghanistan/dp/1304069451
A lot of us read The Bear Went Over the Mountain before that deployment.