Which is more important in combat: Speed or strength?

During our last rotation to Afghanistan you could see a measurable difference in the guys who lifted and those who didn't. On a daily basis we usually run during PT or ruck and these give us increased endurance. But having endurance without the load of is a completely different thing. When a Soldier who has excellent endurance for an APFT is loaded up with gear and forced to jump grape rows and crouch in pomegranate orchards they struggle, I have witnessed the lifters excel because their bodies are used to the resistance and the endurance runners who aren't lifters struggle. I believe you need a balance of both in order to be able to be effective.

I voted Strength, but I'd like to add endurance to that.

Well in Bayonet Training I heard there are two types of fighters.... the quick and the dead.