Games like Base Wars
Games like Base Wars include Battle Brothers, Factorio, XCOM: Enemy Unknown, Age of Empires III: Definitive Edition, and The Last Spell. We matched them by the tags players give Base Wars on Steam (Turn-Based Strategy, Resource Management, Base Building, Military, and Turn-Based Tactics): closest matches first, and among equally close ones the better-known games.

Battle Brothers
Shared: Turn-Based Strategy · Strategy · Turn-Based Tactics

Factorio
Shared: Resource Management · Base Building · Strategy

XCOM: Enemy Unknown
Shared: Turn-Based Strategy · Tactical · Strategy

Age of Empires III: Definitive Edition
Shared: Base Building · Strategy · Military

The Last Spell
Shared: Turn-Based Strategy · Strategy · Turn-Based Tactics

Foxhole
Shared: Base Building · Military · PvP

Your Only Move Is HUSTLE
Shared: Turn-Based Strategy · Strategy · Turn-Based Tactics

Age of Empires II (Retired)
Shared: Strategy · Base Building · Resource Management

Heroes of Might and Magic: Olden Era
Shared: Turn-Based Strategy · Strategy · Tactical

Total War: EMPIRE – Definitive Edition
Shared: Turn-Based Strategy · Military · Strategy

Total War: THREE KINGDOMS
Shared: Turn-Based Strategy · Strategy · Military

MENACE
Shared: Turn-Based Strategy · Strategy · Turn-Based Tactics

Forts
Shared: Base Building · Strategy · Military

Songs of Conquest
Shared: Turn-Based Strategy · Turn-Based Tactics · Tactical

Sid Meier’s Civilization® VI
Shared: Turn-Based Strategy · Strategy · PvP

XCOM 2
Shared: Strategy · Tactical · Turn-Based Tactics

Stronghold Crusader HD (2012)
Shared: Military · Base Building · Medieval

Squad
Shared: Military · PvP · Tactical

Total War: ROME II - Emperor Edition
Shared: Turn-Based Strategy · Strategy · Tactical

Jagged Alliance 3
Shared: Turn-Based Strategy · Turn-Based Tactics · Strategy

Rising Lords
Shared: Turn-Based Strategy · Turn-Based Tactics · Strategy

Warside
Shared: Turn-Based Strategy · Turn-Based Tactics · Strategy

Total War: MEDIEVAL II – Definitive Edition
Shared: Turn-Based Strategy · Strategy · Medieval

Into the Breach
Shared: Turn-Based Strategy · Strategy · Turn-Based Tactics