Since the combination of streets and subterranean & urban structures has become the battlefield of today, it is important to be prepared. Therefore, gaining combat skills in CQB (Closed Quarters Battle) is paramount for fighting terrorism and guerrilla wars. Hence, the armies need to adjust and be prepared to navigate this adversary environment.

Indeed, in the past few years, subterranean warfare has become essentially important. Recent combat experience shows that subterranean structures (natural and human-made) are enhanced and frequently used by enemy forces to gain tactical advantage over larger, more technically equipped and professionally trained armies, because the enemy forces gain tactical advantage.

Subterranean warfare may be roughly divided into two major groups that differ drastically in terms of terrain and surrounding conditions and, thus, require different tactical training.

Read more in the article Subterranean Warfare