User blog:Names are a Spook/A guide to Land Warfare

Doctrines
Doctrines are the topmost idea in your army. Your entire strategical thinking will revolve around this choice, and therefore it is important to choose the correct one for you.

In my opinion, there are 2 main groups of tactics: Planned and Overwhelming. The difference between these two is what they use to leverage. Whilst strategies like Blitzkrieg and Grand Battleplan use carefully planned operations to leverage, Mass Assault and Superior Firepower use their sheer numbers to leverage.

Grand Battleplan
Grand Battleplan is the most generalist of the doctrines. It calls for a highly planned and well organized push. It doesn't have any particularly strong matches, and it has somewhat of a weak match to Blitzkrieg if blitzkrieg is carried out early enough. However, it also doesn't have the manpower or production requirements of the other 2 strategies.

Blitzkrieg
Blitzkrieg calls for a fast push with motorized and armored divisions, disabling enemy defenses before they can prepare. This is countered by the overwhelming strategies, but is effective against Battleplan.

Defense in Depth
Defense in Depth is a strategy that counters blitzkrieg. This strategy gives up land, but inflicts casualties. This will eventually stop a blitzkrieg, at which point you can exploit weaknesses in the front in order to cause a retreat, completely destroying any momentum and inflicting tons of casualties.

Superior Firepower
Superior Firepower calls for an overwhelming amount of firepower, requiring a massive amount of production. This firepower is used to practically flatten any bunker or fort. It is especially strong against Mass Assault.

Mass Assault
Mass assault calls for an overwhelming amount of men, completely overwhelming defenses with a human wave. This strategy can only be used with countries with high manpower, and is rather costly.

Deep Battle
Deep battle is a Soviet strategy, using your amount of manpower to fully use the depth of a battle. This strategy involves shifting around divisions in order to keep your enemy from concentrating their divisons into an advance.

Strategical Concepts
Outflanking - Force a retreat or encirclement by attacking a weakness

Diversionary attack - Force a redirection of force to deal with an attack, either to prepare for an offensive or to stop an advance

Overextension - Being spread too thin to defend effectively