Diesel Tactics uses a WeGo combat system where both players attacks are entered asynchronously and then executed simultaneously!
During a players Combat Phase they input all the attacks that they wish to make that turn and once both players in a battle have done so the combat resolution is determined.
Combatants go in order of Initiative (a characteristic of every Unit in the game), so a quick acting Unit could kill off an enemy before it even gets to attack that turn!
Diesel Tactics adds in a special system for Close Combat attacks where a Unit that gets engaged in Close Combat before they move loses their action during that Combat Phase as they are too tied up fighting for their lives to do anything else! Be very wary of Close Combat specialists getting near your ranged troops!
Having this simultaneous combat system decreases the impact that turn order tends to have on strategy games and creates a more skill based and balanced game!