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Combat and Units

By ScotPublished Updated Sources checked

Tactical Quick Answer

Halo Wars runs on a strict rock-paper-scissors triangle where infantry counters air, air counters vehicles, and vehicles counter infantry. Scout your opponent and build the counter instead of matching their army type, because the biggest army does not win on its own. Veterancy stars act as hidden damage and durability multipliers, so retreat and heal damaged units instead of replacing them.

Halo Wars uses a strict rock-paper-scissors combat triangle. Building the biggest army does not guarantee victory. You must build the right army to counter what your opponent brings to the field.

The Combat Triangle​

The core combat system relies on unit counters. Learn these rules and apply them to every battle:

  • Infantry counters Air. Marines and Grunts rip through banshees and hornets when properly upgraded.
  • Air counters Vehicles. Hornets and Banshees dominate tanks and warthogs from above.
  • Vehicles counter Infantry. Warthogs, Ghosts, and Scorpions crush ground troops easily.

If your opponent builds a massive army of Scorpions, do not build Scorpions to fight them. Build Hornets. A smaller force of air units will decimate a larger force of vehicles. Always scout your enemy. See what they are producing, and build the counter.

Veterancy Mechanics (The Hidden Math)​

Your units gain experience stars, known as veterancy, by dealing damage and securing kills (bounties). Each star acts as a powerful hidden multiplier, massively increasing a unit's Damage Per Second (DPS) and reducing incoming damage.

A three-star basic unit will often obliterate a zero-star elite unit. Those multipliers are why retreating and healing damaged units to preserve their veterancy is mathematically superior to fighting to the death and training fresh replacements. Never throw veteran units away.

Build Times and Supply Costs​

Competitive play relies on exact timing and resource management. You must balance the supply cost, population weight, and build time (in seconds) for every unit in your army. This allows you to calculate resource-per-second expenditures and optimize your opening build orders without stalling your economy. If you are floating resources while your production queues are empty, you are losing the macro game.

Unit Upgrades​

Units start out basic and become specialized through upgrades.

For the UNSC, Marine upgrades add rockets and medics. The rockets give them punch against vehicles, and the medics keep the squad alive. Warthog upgrades add a gunner and a gauss cannon.

The Covenant researches its per-unit infantry upgrades at the Hall, not the Temple. That is where Jackals get the Defense Gauntlet shield and Hunters get the Bonded Shield and Assault Beam. The Temple handles a different layer entirely: Age advancement for your tech level, turret upgrades, shield recharge speed, the Followers population increase, and your Leader's own power upgrades. Mixing the two up will send you to the wrong building mid-match.

Secondary Abilities​

Most units have a special ability, though not all of them do, and several are gated behind an upgrade and are not available from the moment you train the unit. On a controller you activate an ability with the Y button. On a keyboard, press R.

Key UNSC Abilities​

  • Warthog Ram: The Warthog's special attack. It also jumps gaps, which matters for map movement as much as for damage.
  • Marine Grenades: Marines throw grenades as their special ability. Note that the rocket launcher upgrade replaces the grenades instead of adding to them, so upgrading trades anti-infantry burst for anti-vehicle punch.
  • Scorpion Canister Shell: Comes from the Scorpion's first upgrade, never innate, and it is strongest against infantry.

Key Covenant Abilities​

  • Ghost Ram Boost: An upgrade, not a default, and it works much like the Warthog's Ram.
  • Wraith Plasma Mortar: The Wraith's defining weapon, a slow-moving high-damage mortar.
  • Hunter Bonded Shield: Hunters gain the iconic shield that deflects projectiles. This is a passive upgrade, not an ability you trigger, so there is no "shield wall" to activate.

Positioning and Micro​

Positioning matters. Keep your specialists behind your tanks or heavy infantry. Neither the Wolverine nor the Locust is general artillery, and treating them that way wastes both. The Wolverine is a dedicated anti-air tank, so it protects your army instead of damaging theirs on the ground. The Locust is an anti-structure siege unit, a building killer that fires while stationary and performs poorly against anything that is not a structure.

Do not rely entirely on the "select all" command. If you send your entire army into a chokepoint, they will clump up. A single MAC Blast or Carpet Bomb will wipe them out. Split your forces. Attack from two directions. Force your opponent to divide their attention.

Countering Leader Powers​

New players often feel cheated by devastating Leader Powers like the Prophet's Cleansing Beam or Cutter's MAC Blast. These powers are balanced by high resource costs and long cooldowns.

For the UNSC, the hard counter to Covenant leader powers is the Disruption Bomb, available to any UNSC leader for 450 resources. It halts whatever power is being used for about a minute and blocks new activations inside its radius while it is live. That leaves a pushing Prophet of Regret exposed to focused fire. Use it when a Covenant leader commits to your army instead of saving it.

Frequently Asked Questions​

What counters what in Halo Wars?

Infantry counters air, air counters vehicles, and vehicles counter infantry. If your opponent masses Scorpions, build Hornets instead of matching tanks, because a smaller force of air units will decimate a larger force of vehicles.

Should I heal veteran units or just build new ones?

Heal them. Each veterancy star is a powerful hidden multiplier that raises damage per second and lowers incoming damage, so a three-star basic unit will often obliterate a zero-star elite unit.

How do I use unit secondary abilities in Halo Wars?

Most units have one, though not all do, and several only appear after you research an upgrade. Press Y on a controller or R on a keyboard. The Warthog Ram and Marine grenades work from the start, while the Scorpion canister shell and the Ghost ram boost both arrive through upgrades.

How do I counter Covenant leader powers as the UNSC?

Use the Disruption Bomb, available to any UNSC leader for 450 resources. It halts the power being used for about a minute and blocks new activations inside its radius, which leaves a pushing Prophet of Regret exposed to focused fire.

Why does one leader power wipe out my whole army?

You are clumping. Sending everything through a chokepoint with the select all command bunches your units so a single MAC Blast or Carpet Bomb catches all of them. Split your forces and attack from two directions.