Not to be a negative influence here (and to stand to speak when I much prefer to keep my head down and just lurk and enjoy, which I will return to when I've posted this), but if you quiz a ground solider who has been faced with the actual situation, on the ONLY accepted response to an ambush (particularly an L-shaped ambush), you will discover that they will overwhelmingly say "Through it...you open up an run through it". You would absolutely NOT retreat at that point, "cargo" focused or not (no cargo is more precious than your own glutes, at that point anyhow). To pause or retreat is considered sure suicide. As far as I know it's taught this way, and certainly it's been practiced this way.
I didn't have a combat MOS; mine was medical training, but I was on the periphery of it all, '66 through '69. I've heard this verbally from long suffering 11 B's, and I've seen it written in at least one written account of that war. Perhaps from the vantage point of set-piece tactics your training is sound and acceptable, but not, according to friends and fellow soldiers, when you're knee-deep and you have rounds sucking past your ears.
I offer this as counterpoint, not inflammatory or demeaning.