In the somewhat distant future, the humans managed to win over Skynet. They begin converting factories over to their control and start producing perfectly human loyal T-800 and T-1000 units, as well as ground and flying HKs, both sentient loyal ones and even manned ones. All of a sudden a small forces gets whisked away.
In the very distant future, a Starleague Battemech regiment is on exercise. In it includes several Mech and tank lances, platoons of infantry and full air and logistics support. Suddenly, they are whisked away.
In an alternate timeline, the Macross with its full compliment is also whisked away.
In another alternate timeline, a second-batch Beserker falls into a wormhole.
And whatever universe they're from, that Hammer's Slammers thingy guys show up.
They end up on a strange and dark planet called Middle Earth. Except that Sauron has a few force additions as well...
so, here's the breakdown:
Your forces:
150 T-800 Terminator sentient battle bots
100 T-1000 Improved Terminator sentient battle bots
12 ground based HK sentient units
12 areal HK sentient units
4 manned areal HK units acting as spotters and force coordinators
1 SL assault lance composed of 85 ton Stalkers
2 SL heavy lances composed of 75 ton Shootists
1 command lance of 1 75 Black Knight and 3 90 ton Highlanders
3 scout lances of 30 ton Mongooses
12 infantry platoons, each with its own Karnov
3 Planetlifters
1 Union DropShip
1 Lance of Stingray 65 ton space superiority fighters
1 Lance of Chippewa 90 ton assault bombers
1 Lance of Ahab 90 stand-off assault bombers
The Macross and its full compliment
A full fledged, fully-complimented 2nd batch Beserker, with full production facilities
some random Hammer's Slammers (I don't know this universe, ok?)
VS....
Sauron's Army as seen in LOTR (both books and movies)
20,000 Federation Redshirts
200 Federation ships
40,000 Jem'Hadar troops
600 Dominion Warships
25,000 Cardasian troops with full Obsidian Order support
500 Cardiassian warships
12,000 Romunlan troops with 2,000 Tal'shihar operatives
150 Romulan warships
30,000 Klingon warriors
600 Klingon warships
1,000,000,000 Borg drones
1,000,000 Borg Cubes, "standard variant" (we'll just assume they have this much, even if it means diverting their entire Delta Quadrant fleet)
How long can the forces of Evil hold out? Do they even have a slight chance of winning? What would you do to bring about the swiftest of victories?
Conditions:
The Beserker Sphere cannot just destroy Earth, resulting in the deaths of all allies on it

However, it can harvest the Moon for resources, and can even make trips to the Asteriod Belt, and return
All SL fighters are based on the Drop Ship in orbit. The Planetlifters and Karnovs are stuck on the ground and are thus vulnerable to enemy fire.
Ships in orbit are free to support their forces in whatever way they may choose. For balance reasons, enemy ships may not engage the Beserker sphere and thus the Beserker sphere may not engage enemy warships. Any fighters from either fleet are on free engagement rules, however.
Other than that, all units are also on free engagement rules.