Marine Role and Tactics

What marines are

A marine infantry division is a division on the map whose template has Marines battalions. In a war role this is no longer “just infantry that took a boat”: different terrain bonuses, a different point to a landing, and special forces status.

The main difference is an attack bonus in naval landings, marshes, and rivers plus dependence on the special forces cap. One Marines battalion eats 150 rifles; regular infantry takes 100. Training a marine battalion is 120 days; regular infantry is 90.

A marine battalion has organization 70, infantry 60, but HP is 20 against 25 on regular infantry. Battalion breakthrough is 30% higher — you feel that on the beach. Combat width of the battalion is 2, same as infantry: you still count the template by the division’s total combat width.

The battalion unlocks with Marines I in the special forces tree (the Infantry section in research). Marine divisions count toward the special forces cap — you cannot spam them forever.

Marines battalion — the core of a landing division (best pick for a naval assault) Regular infantry — cheaper and easier to mass, but they and water are barely on speaking terms

Why you need marines

Without marines you can fight most of a land war with regular infantry — especially if you never sail anywhere. But the moment you need a beach, an island, or a river, plain infantry starts chewing the tile with a −50% landing penalty to attack. Marines exist to break that jam.

Playing Japan, Pacific islands with regular infantry are misery; proper marines handle it much better. As the USA, island-hopping without them turns into a lottery too.

And sometimes serious players raise marines as Germany so the 1941 push through Soviet marshes feels a lot less painful.

• Naval landing. The battalion gives +50% amphibious attack — right against the landing penalty. Regular infantry paddles there; marines actually hit.
• Marshes and rivers. On marsh a marine gets +30% attack, on river also +30%. Regular infantry on marsh takes −40% attack from terrain.
• Ports and beachhead. After the beach you need a tile that can feed supply. Marines take the beachhead; regular infantry or tanks then lock the inland and push the breakthrough.

Do not build a “marine line” from sea to sea across land. Marines eat the special forces cap and an extra 50 rifles per battalion; smear them across the front and you get pretty icons and an empty cap. A separate corps on a chosen beach works much better than “one marine division per army”.

Even if industry lets you raise a lot of marines — still a bad idea if you do not need them. Better spend the cap on what you actually need right now, mountain infantry for example.

Concentrate marines on landings and water; do not sprinkle them across the plains.

The main role of marines

The main job is to take the beach and push where water gets in regular infantry’s way: landing, marsh, river. To actually use them, marines go into the assault and through water, not sit for months on dry plains instead of regular infantry.

Simple scheme: regular infantry holds the land and combat width, marines take part in naval landings and marsh/river offensives. Mix it up and the marine corps gets stuck in the meat grinder as expensive infantry with no sea.

Key idea: marines are not “better infantry for everything”, but a separate template for landings and water. A few well-built divisions usually beat a dozen half-empty “almost marines”.

How effective marines are

On a landing marines are effective: the −50% attack penalty is almost covered by the battalion’s +50%. On a marsh regular infantry takes −40% from terrain, marines add another +30% attack on top — the gap is huge. On dry plains with no water a marine is not stronger than regular infantry: HP is even a bit lower (20 vs 25), and you pay 150 rifles instead of 100.

If special forces are scarce — better 2–4 real marine divisions than ten “almost marines” with no equipment. In HoI4 an under-strength landing looks scary on the invasion arrow and sad in combat.

Marines vs regular infantry

Infantry and marines solve different jobs. Regular infantry is cheaper, easier to mass, and holds a front without drama. Marines cost more and hit the special forces cap, but they win where you need a beach, a marsh, and a river.

Marines — landing and water Regular infantry — mass and front

Do not expect marines to “replace infantry because they are elite”. Regular infantry covers the map; marines decide where that map starts from the water.

Marine tactics

The idea is simple: gather marines into a fist, hit a chosen beach, and regular infantry keeps the beachhead from snapping shut and covers the inland.

Almost useless if you ignore factors like: a proper division template, supply and ports, doctrines, planning, the right landing tile

Do not only look at naval landings — look at marshes too. Spending a bit more time before the war to raise a few marine divisions is much more effective than attacking marshes with regular infantry and huge penalties.

Combat width and composition

A marine battalion has combat width 2. Landings are often narrow, so do not inflate a 40-width museum for no reason. In practice keep landing templates around 14-20 combat width. Support companies dilute organization but give useful buffs — factor them in when you build.

How to fit them into the army

• A separate marine corps for the landing — do not mix with a quiet defensive line deep inland unless you have a reason.
• Before the assault look at terrain and supply: a beach with a port nearby beats a pretty arrow into bare rock.
• After landing do not freeze on the first tile if the beach is already yours — marines exist for a beachhead, not eternal dune defense.
• Keep a rifle and reinforcement reserve: a division with no equipment on the beach is just a slow target for the counterattack.

What not to do

• Do not frontal-charge dry plains with a marine corps on principle — find water or leave the job to regular infantry.
• Do not smear marines one division across the whole front — you lose landing concentration.
• Do not forget the navy and air cover: an expensive landing with no sea and no sky turns into a floating coffin fast.
• Do not build the whole army from marines (the special forces cap and rifles will punish that quickly).

Working with regular infantry

1. Regular infantry holds the land and pins the enemy on a wide stretch.
2. The marine corps hits a narrow beach where landing and supply allow it.
3. After the break, marines lock the beachhead; regular infantry takes the shoulders and keeps the landing from being thrown back into the water.
4. When the move is done — marines get a short rest (to recover) and go back into a water strike, not an eternal line instead of infantry.