Force shield / barrier / defense, is a defensive Force power that can be used by Force users in battles, it's also for preventing to getting ragdolled, incapacitated or choked with the Force by other Force users.

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A basic usage of Force shield, padawan Vos and Obi-Wan are using a defensive Force power, and creates a shield of Force energy against the carnivorous bugs, the challat eaters. (Legends)

Source: Star Wars 39: The Stark Hyperspace War, Part 4 (2002)

Another example of Force barrier, Darth Azard uses Force shield to defend himself from the explosion. (Legends)

Source: Star Wars Legacy 22 (2008)

Darth Zannah uses the Force to shield herself from an explosion. (Legends)

''She recognized it as the casing of a demolition charge just in time to throw herself backward, using the Force to shield herself from the worst of the explosion.''

Source: Darth Bane: Dynasty of Evil (2009)

Yoda, Anakin and Aayla Secura projects a Force barrier against the poisonous gas. (Canon)

Source: The Clone Wars: Season 2 Episode 19 (2010)

Vader uses a Force shield to protect himself and Aphra. (Canon)

Source: Darth Vader Vol.4 End of Games (2016)

Sidious and Vader uses the Force to deflect shock wave of an explosion. (Canon)

''Both guards immediately activated and tossed grenades; five seconds later the tunnel behind them reverberated with the sound of the explosions, lylek screams, and the rumble of falling stone.

The blast wave roared from the confines of the tunnel. Vader and the Emperor used the Force to deflect the bulk of the wave from them, but the power of it drove the two Royal Guards face-first into the floor, their armor scraping along the stone.''

Source: Star Wars: Lords of the Sith (2015)

Darth Sidious deflects multiple blaster bolts from an assassin. (Canon)

Source: Star Wars Annual 1 (2015)

Jedi Master Salmara uses a Force shield to protect herself and the mercenaries. (Legends)

Source: Darth Maul: Death Sentence #02 (2012)

Darth Vader deflects a blaster bolt. (Canon)

Source: Star Wars - The Empire Strikes Back

Darth Chratis uses a Force shield. (Legends)

''A powerful roaring filled the air. The lines in the sky converged on a point. The hieroglyph was complete.

Darth Chratis vanished behind a shimmering Force shield. Shigar stood unprotected, at one with the other troopers staring up at their deaths. He wasn't afraid to die.''

Source: Star Wars - The Old Republic: Fatal Alliance (2010)

DE Luke creates a Force shield around himself. (Legends)

Darth Tenebrous uses a Force shield to protect himself from a giant fireball. (Legends)

''A muffled but ground-heaving detonation followed; then a roiling fireball that was the labyrinth’s scorching exhalation. Whirling to the tunnel they had just exited and managing somehow to remain on his feet,

Tenebrous conjured a Force shield with his waving arms that met the fireball and contained it, thousands of flaming hawk-bats spiraling within the tumult like windblown embers.''

Source: Darth Plagueis Novel (2012)

Darth Maul deflects Bo-Katan's blaster bolts by using the Force. (Canon)

Source: The Clone Wars: Season 7 Episode 10 (2020)

Darth Plagueis absorbs a blaster bolt. (Legends)

''The lightsaber had scarcely left the Muun’s grip when Wandau flew from cover to bring the attack to the Muun, triggering his blaster as ceaselessly as Maa Kaap was still doing.

This time, though, the Muun merely stretched out his right hand and absorbed the bolts. Traveling up the length of his arm and across his narrow chest, the energy seemed to fountain from the hand awaiting the return of the spinning weapon as a tangle of blue electricity that hissed from his tapered fingers, catching Wandau full-on and lifting him to the ceiling of the hold before dropping him to the puddled deck in a heap, as if his bones had turned to dust.''

Source: Darth Plagueis Novel (2012)

Force Users vs. Force users

Now, let's see how does it work at Force attacks.

Anakin uses the Force on Aayla Secura, padawan Ahsoka and other Clone Troopers, Ahsoka and the Clone Troopers getting knocked out on the floor, while Aayla isn't, due to her defensive Force powers. (Canon)

Source: The Clone Wars: Season 1 Episode 13 (2009)

In another example, Ventress uses Force blast on Anakin and the Clone Troopers, Anakin uses his defensive Force powers to keep his balance, while non-force sensitive Clone Troopers gets knocked out. (Canon)

Source: The Clone Wars: Season 3 Episode 02 (2010)

Darth Stryfe and Cade Skywalker stalemates in a Force contest. (Legends)

Source: Star Wars - Legacy 31 (2008)

Darth Maul casually deflects Force attacks from Darsha Assant, what was strong enough to shove several large tanks. (Legends)

''He focused his attacks, forcing her to use a more technique-based defense.

She leapt down to the floor, and he followed her. He felt a Force-powered pressure move toward him and deflected it, sensing several large tanks and canisters being shoved around behind him. She was growing weak. Such an attack was a sign of desperation.

Soon it would be over. He dived forward, rolling to come up alongside her, deflecting her attack as he did so. Another invisible pressure wave knocked over more equipment behind where he had been.

Pitiful.''

Source: Darth Maul: Shadow Hunter (2001)

Wolf Sazen protects himself from Cade's Force attack. (Legends)

Source: Star Wars - Legacy (2008)

Both Darth Bane and Darth Zannah know how to defend themselves against Force attacks. (Legends)

''There was also his incredible command of the Force to contend with.Simple tactics like pushing an opponent from across the room were impractical against any foe with proper training. Both she and Bane knew how to surround themselves with an invisible field of energy that absorbed or repelled the most basic tricks taught to any Jedi or Sith.''

Source: Darth Bane: Dynasty of Evil (2009)

In another example, Darth Maul and his apprentice are using a Force blast against a large group of mercenaries and Jedi Master Salmara and Judd manages to keep their ground against that powerful attack with some difficulty. (Legends)

Source: Darth Maul: Death Sentence #02 (2012)

In another example, Obi-Wan and Anakin keeps their ground against Count Dooku's Force push, (Canon)

Obi-Wan and Anakin are affected only a little by Dooku's Force push because of their Force defenses.

While the Pyke guardians were knocked out. (Canon)

Source: The Clone Wars: Season 6 Episode 10 (2014)

Ventress uses her Force powers to defeat Jedi Master Luminara, and she fails to overpower her. (Canon)

Source: The Clone Wars: Season 1 Episode 09 (2008)

Similar to the previous example, Anakin tries to overpower Obi-Wan with the Force, and Obi-Wan blocks his attack. (Canon)

Source: Star Wars - Revenge of the Sith (2005)

Obi-Wan deflects Force attacks from Anakin. (Canon)

''They spun and whirled throughout its levels, up its stairs, and across its platforms; they battled out onto the collection panels over which the cascades of lava poured, and Obi-Wan, out on the edge of the collection panel, hunching under a curve of durasteel that splashed aside gouts of lava, deflecting Force blasts and countering strikes from this creature of rage that had been his best friend, suddenly comprehended an unexpectedly profound truth.''

Source: Revenge of the Sith Novelization (2005)

Ben Solo tries to use his Force powers against the Force sensitive, dark side users Knights of Ren, (Canon)

He can only knock down one of them, but not to a significant distance. While the other Knights of Ren counter attacks him with their own Force push, and they only staggered Ben Solo a little. (Canon)

Source: The Rise of Skywalker (2019)

From Luminara vs. Ventress duel, she uses the Force to throw objects on her, and Luminara sends objects back with the Force. (Canon)

Source: The Clone Wars: Season 1 Episode 09 (2008)

Obi-Wan Kenobi uses the Force to stop Ventress' Force attack. (Canon)

Source: The Clone Wars: Season 1 Episode 16 (2009)

It has been stated that Obi-Wan could counter Count Dooku's Force choke attack, if not for being too sudden. (Canon)

''Count Dooku half-turned and raised a hand. A rush of dark power lifted Obi-Wan off his feet and choked the air from his lungs. He reached for the Force to counter Dooku, but the attack had been too sudden. He saw Dooku twist, kicking out at Anakin with all his weight behind it. Anakin fell backward, and Dooku hurled Obi-Wan over the edge of the balcony.''

Source: Revenge of the Sith Junior Novelization (2005)

Darth Wyyrlok uses a protective Force shield against Darth Krayt's Force attacks. (Legends)

Source: Star Wars - Legacy War #01 (2010)

FORCE LIGHTNING DEFLECTION

RotJ Luke deflects a small portion of Sidious' Force lightning. (Canon)

''The young Jedi was at once confounded and in agony -he'd never heard of such a power, such a corruption of the Force, let alone experienced it. But if it was Force-generated, it could be Force-repelled. Luke raised his arms to deflect the bolts. Initially, he was successful - the lightning rebounded from his touch, harmlessly into the walls.''

Source: Return of the Jedi Novelization (1983)

Celeste Morne deflects a Force lightning attack from Darth Maladi. (Legends)

Source: Star Wars - Legacy #31 (2008)

Yoda deflects Dooku's Force lightning. (Canon)

''Dooku gave a little growl and thrust forth his hand, loosing a line of blue lightning at the diminutive Master. Yoda caught it in his own hand and turned it aside, but far from easily.

More lightning poured forth from Dooku's hand, but Yoda continued to catch it and turn it, and seemed to become even more settled in his defensive posture.

"Much to learn you still have," Yoda remarked.''

Source: Attack of the Clones Novelization (2002)

DODGING BY USING FORCE JUMP AND SPEED

Dooku uses Force jump to dodge from Kenobi's and Anakin's combined Force blast attack. (Canon)

Source: The Clone Wars: Season 6 Episode 10 (2014)

Force jump can be also effective against a Force lightning attack. (Canon)

''The count extended his arm, and Force lightning leapt from his hand. But Vos wasn't there.''

Source: Star Wars: Dark Disciple (2016)

Darth Zannah uses her agility to dodge Force lightning. (Legends)

''As she gathered herself to charge, Bane fired off another bolt of lightning. She ducked to the side and it whizzed past her ear, striking the wall and sending up a shower of dust and stone flecks.''

Source: Darth Bane: Dynasty of Evil (2009)

Anakin uses Force jump to dodge from Dooku's lightning. (Canon)

Source: The Clone Wars: Season 6 Episode 13 (2014)

DEFENSE FOR FORCE CHOKE

DE Luke comfortably stops the Force choke attacks of Sedriss and Goir. (Legends)

Source: Star Wars - Dark Empire II #03 (1995)

Jaina breaks a Force choke attack of Jacen. (Legends)

''Jaina put every scrap of strength she had into breaking Jacen's invisible Force choke hold on Mirta. She saw it like a black chain and visualized the links flying apart just as Carid shot past her and scrambled up the ladder followed by Vevut...''

Source: Star Wars - Legacy of the Force Revelation (2008)

Cal Kestis stops Darth Vader's Force choke attack after throwing a large piece of machinery towards him by using the Force. (Canon)

Source: Jedi Fallen Order (2019)

Jedi Master Kirak Infil'a stops Darth Vader's Force choke attack with a Force push. (Canon)

Source: Darth Vader #03 (2017)

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