What effect does a unit with the Assault keyword have while attacking?

A unit with the Assault keyword gains additional Might while attacking, which enhances its offensive capabilities. This is crucial in gameplay as increased Might translates to higher damage output during an attack, allowing the unit to deal more damage to the enemy. The Assault keyword emphasizes aggressive tactics, making units with this designation particularly effective at breaking through enemy lines or taking down key targets quickly.

In contrast, the other choices do not align with the specific mechanics of the Assault keyword. Additional health or defensive bonuses would relate more to survivability than aggression, while the ability to attack twice pertains to different tactical keywords or abilities that focus on multiple engagements rather than enhancing a single attack's effectiveness. Understanding the role of the Assault keyword helps players strategize effectively, maximizing their units' offensive potential in various combat scenarios.