Have to disagree on this one. A Space Marine Chapter is exactly 1000 marines (plus support staff which are more or less normal humans, servitors etc.) While the Marines are Superhumans, they (on a tactical level) do not have any psychic powers or precognition abilities. Superhuman speed, yes, but withing physical limits. What also is an issue is that also a standard Jedi (presuming he/she is human - which is not always the case^^) also has access to high tech implants on bio and cyberware level. [Appart from what we see in the game 2 - implant slots each, we remember robotic hands, etc.] So our really fast Spacemarine still moves on a basis of normal phyisics - if also much faster than a top trained human. In response a Jedi may rely on the wonderful power of Force speed (available in all different shades of "fast") - so I see no real advantage here. Raw strengh goes to the Marine, even without the wonderful armor. Alas Jedi fighting styles (sith fighting is something completely else) do usually not rely on strengh. Superior intellect - well it is said Space Marines are superior in their mental attributes - I just fail to see it in actually every publication they show up. Neither are their tactics really brilliant nor their strategy. It's more a "KKN'D" mentality. If you can charge it - you charge it and you certainly don't try to think about what your enemy could do. Space marine Armour probably can be handled as being coated with Cortosis or something like that so not much change of doing signifanct damage with a lightsaber to it. Still does not rule out the possiblity of choping up the precious boltgun and the knife (powered weapons might be different of course). Even a lightsaberthrow may get rid of the bolter. Bolterammo, Plasma, and anything you shoot at a Jedi are a waste of time - it'll be deflected one way or another (most likely just by a forcefield, an application of force push or even the lightsaber - if unlucky straight back into the face of the Marine that shot the stuff at him) or at least dodged (remember the precoginition - he knows where you'll shoot) And now for the grand finale (some other point ill just spare you for the moment). How would I try to defeat a Space Marine as a Jedi? Try 1: Dont - just use "These are not the droids you are looking for!" - Mind Trick. - Since Space Marines are superhuman - "Human" is the essential word here they still might fall for it. Try 2: Force lift - since the paragons of Jediness can lift things like imperial class stardestroyers an average Jedi should have no problems in lifting a space marine. - Once you have him up you turn an move him as you like right to the next cliff, or other appropriate sight and let the drop do the rest - if this fails - repeat - repeat -repeat Try 3: Use Force to crush the petty armor from outside in (not a nice thing to do but very effective and not even a dark side power. Try 4: Use Force to deavtivate Armor (easy going just use "stun droid") and the Marine will not even be able to move in his selfmade prison. (All those servos...) As for all and any of these compared fights my general rule is the one prepared for the other wins. Cheers