This important battle would probably change the tide of the war in favor of the Japanese in the Pacific, or at least let the Japanese stall out for a little while longer. This was the battle that changed the outcome of the Pacific Theatre, so what would happen if the Japanese won at that fateful battle?
The [Evil] Empire didn't view [Planet With a Lot of Numbers in its Name] as significant.
The [Good] Federation officially considers every inhabited body significant, but, let's face it, they didn't really consider [Planet With a Lot of Numbers in its Name] significant, either. That's why it had numbers in its name.
Of course, they now both know it as a very significant place, because it was in orbit of this world that a very significant event occurred.
The [Evil] Empire was in the process of boarding the [Good] Federation's local fleet's Flagship, the [Obscure Synonym for Altruism] - they got more babies to skin alive with wooden sporks by boarding it than by blowing it up with a MegaUltraHyperDeathBeam Mk. 3 - when they encountered a new, weird, bipedal hairless carapaceless pink thing that one of them might vaguely have recognised as something [Student too Dumb to Actually get There on Merit] abducted (somehow), but in reality none of them actually ever figured it out.
Anyway they very quickly figured out that this thing would be a bit of a massive problem when it proceeded to eat DeathLaser fire (quite literally, it got shot in the mouth multiple times), say its first words to the galaxy, and then go on a rampage, single-handedly (literally, it did it with one hand behind its back) cleaning both the [Obscure Synonym for Altruism] and the vessels boarding it, the [We Like Genocide] and the [Kill! Hurrr Durrr], of hostile presence, before commandeering all three and using a rudimentary knowledge of military tactics to outflank and trash the rest of the [Evil] Empire's in-system Navy.
Needless to say that, one 60-part pancakes-included-just-add-water quest later, the [Evil] Empire was on its knees.
The first words that that thing - a "Human", apparently ^((A/N: don't believe this, guys, I'm pretty sure that's misinformation!)**) spoke to the Galaxy are now forever burned - quite literally, with a plasma torch, along with detailed depictions of multiple exotic kinds of genitalia - into the Imperial Archives on the [Evil] Empire's home world of [Name Ending in '-Raxis'].
"I don't know who the hell you are, I don't know who the hell anyone is, I don't know how or why I'm here, but the Gravity's so low here that my muscles will atrophy in like a month if I don't get what I'm used to, I'm somehow naturally immune to your weapons, and you're doing something I strongly morally disagree with. Let's do this."
