''Kenran Butōsai Za Māzu Deibureiku'', or '''''MarsDaybreak''''', is a HumongousMecha anime aired in 2004 by TVTokyo and licensed by Bandai Entertainment in the US.

The story takes place on a colonized Mars, where nearly the entire planet (save for the peak of Olympus Mons) is covered by a massive ocean (the initial colonization apparently having GoneHorriblyWrong). The people live on floating city-ships, with the planet's abundant water being their primary export. Somehow, the end of the "Pan-Galactic War" has left the planet in the midst of a severe economic depression. Of course, Economic troubles mean crime. And with a planet that's nearly all ocean, that can mean only one thing: {{Pirate}}s! With the surface under heavy satellite surveillance, the pirates have been forced underground. Or rather, under''water''. Instead of sailing over the waves, they lurk ''under'' them in submarines. And the baddest pirates around are the crew of the sub ''Ship of Aurora''.

Which brings us to our hero, Gram River: A young man living on the city-ship Adena. While trying to help a friend get out of a bad situation, he ends up in the middle of a raid by the ''Ship of Aurora'', and thrown overboard when the port is rammed and breached. Fortunately, a HumongousMecha comes out of nowhere and rescues him. Unfortunately, this mech is assumed to be part of the pirates' forces, and is promptly attacked by the local [[TheFederation Earth Forces]] mechs. He is eventually hired on by the crew to pilot the mech.

Naturally, nothing goes that easy, or there wouldn't be much of a series. The first major complication is the fact that Vess, one of Gram's dearest childhood friends, has just been stationed to Mars as part of the Earth Forces, and she isn't happy at ''all'' to discover that he's become a Pirate. The other is the initially-unrelated kidnapping of the Granddaughter of the Earth's President, that they get blamed for when they just happen to go after the real kidnappers for their own reasons, and wind up catching them just as they're trying to ransom her, and further complicated when they end up inadvertently recruiting her.

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!!Tropes:
* AMechByAnyOtherName: Round Bucklers, usually shortened to RB's.
* AllThatGlitters: The Treasure of the Aboriginal Martians.
* {{Badass}}: Grahms, Vess and Yagami.
** BackToBackBadasses: [[spoiler: Grahms and Vess]].
** BadassCrew: The entire crew of the Ship of Aurora.
** BadassBaritone: Chrysalis Milch and Poipoider.
*** Justified for they are voiced in the English Dub by Creator/JamiesonPrice and Creator/MichaelMcConnohie respectively.
* BashBrothers: Grahms and Yagami.
* BigBad: Niell Poe.
* BigDamnHeroes: Several of them but Poipoider somehow makes quite an astonishing amount.
** He saved Grahms and Enora from falling down.
** And to the crew when they were under fire in a cave.
*** Vess saved Grahms from the Earth Forces.
** [[spoiler: That's when things became grim Grahms came in with a [[LargeHam hammy speech]] and then came Yagami.]]
* [[spoiler: BikerBabe: Vess]]
* ButtMonkey: Anna Grace.
* TheCaptain: Elizabeth
* ClingyJealousGirl: Enora Taft.
* CombatTentacles: The main weapon of Kubernes' [[OurMermaidsAreDifferent Mermaid]].
* ConspicuousCGI
* CoolBoat - The ''Ship of Aurora''.
* DarkAndTroubledPast: Yagami.
* {{Determinator}}: Grahms.
* [[DieHardOnAnX Die Hard On A Pirate Submarine]]
* FallingIntoTheCockpit: Well, ''floating'', anyway...
* FaceHeelTurn: Yagami, Poipoider, Aki and Junior [[spoiler: Subverted. It was just a prank for the birthday of Ester.]]
* FreakOut: When Rich found out that Vess is still alive.
* GenkiGirl: Enora Taft.
* [[spoiler: HeelFaceTurn: Anna Grace and Kubernes.]]
* HeyItsThatGuy: [[SuzumiyaHaruhi Itsuki lives with his siblings Kunikida and Kyon's sister on a giant ship!]]
* HotBlooded: Grahms and Vess.
* JerkWithAHeartOfGold: Grahms.
* {{Keet}}: Junior.
* LadyOfWar: Ester.
* MacrossMissileMassacre
* ManipulativeBastard: Kubernes.
* MechaMooks: Earth Force RBs are remote controlled.
* McGuffin: Grahms' pendant and the Box of Guidance.
* NiceHat: Milch
* NamesToRunAwayFromReallyFast: Subverted with two of the strongest RBs in the series, named Mermaid and Squirt.
** Not as much of a surprise given that the other two are named "Vector of Hope" and "Wing of Samurai".
** Of course Yagami holds this title pretty well, given that his nickname is "Yagami the Shinigami". He backs it up VERY well too given his track record of being able to dismantle multiple enemy round bucklers in a single swoop. He pretty much is pretty much the more experienced version of Graham who is already noted to being capable of taking on multiple round bucklers in his own right.
* ObfuscatingStupidity: Captain Doolittle to a T.
* OneManArmy: Grahms.
* OnlyInItForTheMoney: Pirates! [[CaptainObvious What else]]?
* OurMermaidsAreDifferent: Kubernos' RB and it is so freakin' ugly.
* PapaWolf: Milch towards Megumi.
* RealRobot
* RedOniBlueOni: Vess' Red to Grahms' Blue and Grahms Red to Yagami's Blue.
* [[ReallySevenHundredYearsOld Really 140 years old]]: [[spoiler:Ester]]
* RedBaron: Yagami is known as "TheGrimReaper"
* RidiculouslyCuteCritter: Clara.
* RuleOfCool: Among the Pirates are a talking Cat and a small whale wearing PoweredArmor. No explanation is given for their existence.
* SapientCetaceans: Poipoider, a dolphin who spends much of his time in a suit of power armor wielding heavy weapons.
* SayMyName: KUBERNES!!!!
* ScoobyStack: Ep 13. NUFF' SAID!
* ShrinkingViolet: Megumi.
* SmugSnake: Anna Grace and Niell Poe.
* SubmarinePirates
* TalkingAnimal: Clara and Poipoider.
* TalkingToHimself: Poipoider and Neill Poe. Both of them were voiced by Creator/MichaelMcConnohie.
* TheOnlyOneAllowedToDefeatYou: Vess towards Gram.
* TooDumbToLive: Those kidnappers that kidnapped Enora Taft.
* [[spoiler: TookALevelInBadass: Junior, just Junior.]]
* ThePiratesWhoDontDoAnything: Kuberness is a partial example. Though he has the loot to back up his pirate-ness, throughout the show he acts more like a mercenary than anything.
* {{Tsundere}}: Vess and Enora.
* {{Uplifted Animal}}s: Cats and Porpoises, apparently
* VictoriousChildhoodFriend: Vess.
* UsedFuture: Very much! We see several ships being dented or what have you buildings. Heck, even a university is abandoned.
* YouGottaHaveBlueHair: Ester, who has dark purple hair and Megimi, wno has a real deal blue hair.
* {{Zeerust}}: Okay, this was supposedly set somewhere in the future where there are HumongousMechas are all over the waters yet there are still cars that look like 90's and early of the 2000's and even some like what we have now. Even more that they have the Martian Aborigines that had stuffs that are present in the present.

!!Voice Talents:
!!!English
* Creator/CrispinFreeman - Rich
* Creator/JohnnyYongBosch - Gram
* Creator/SteveBlum - Yagami
* Creator/YuriLowenthal - Junior
* Creator/MelissaFahn- Vess
* Creator/BarbaraGoodson- Elizabeth
!!!Japanese
* Creator/TomokazuSeki - Gram
* Creator/HoukoKuwashima - Vess
* Creator/TetsuInada - Rich
* Creator/DaisukeSakaguchi - Junior
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