Culture "soldiers"(Field Agents) have robot suits, with sophisticated combat technology In the thick of combat, the robots basically take over complete tactical control. Human control would be over decisions on a more strategic level.

The suits will automatically be displacing and targeting based on their objectives. The humans are basically along for the ride once the shooting starts, although they'll be fed tactical data and can* override the suit decisions.

*well. If they stridently disagree, they can normally convince the suit. Battlesuits are either near-intelligences or actual intelligences.