The following pictures are meant to display possible physical characteristics of the present invention and are not to be taken in a limiting sense. It is understood that other embodiments may be utilized and that structural changes may be made without departing from the scope of the invention.

LIST OF REFERENCE NUMERALS 10 present invention 52 second end of 16 12 vehicle 56 ballistic shield housing 13 door of 12 58 shaft pivot mount 14 defense barrier 60 front armor plate 16 armored shield 61 slot 18 transparent ballistic shield 62 rear armor plate 19 Lexan 64 viewing and firing port 20 halogen light 66 small arms fire 22 flashing light strip 68 magnum pistol fire 24 track mount 70 medium rifle fire 26 slidable track 72 high velocity armor piercing rifle fire 27 user control unit 74 radar identification and warning system 28 hydraulic piston 76 radar 30 hydraulic cylinder 78 radar sensor 32 shaft of 28 80 audible alarm 34 pivot hinge 82 pedestrian 36 first end of 30 84 target vehicle 38 second end of 30 86 front defense barrier 40 first end of 32 88 rear defense barrier 42 second end of 32 90 flip down table top 44 cylinder slide mount 92 hinge of 90 46 first end of 24 94 thumbscrew of 90 48 second end of 24 96 locking port 50 first end of 16 98 marquee screen

FIGURE 1 FIGURE 1 is an illustrative view of the present invention 10 in use. Shown is a frontal illustrative view depicting the present invention as being a vehicle 12 mounted deployable defensive barrier 10 being field expedient and deployable by personnel to provide ballistic defense or a hardened extension of said vehicle blocking or ramming a target vehicle. The primary components of the present invention 10 comprises a pivotable defense barrier 14 with an armored plate 16 and an integral coplanar bulletproof transparent shield 18 that selectively extends therefrom. FIGURE 2 FIGURE 2 is a side view of the present invention 10. Shown is a side view of the present invention 10 with a front defense barrier 86 and a rear defense barrier 88 mounted on a vehicle 12 in the closed position when not in use. While depicted on a police vehicle 12 the deployable shield 10 has a pivoting defense barrier 14 that will find application in any vehicle 12 requiring ballistic protection or ramming, such as military vehicles. The defense barriers 14 are hydraulically deployable from the interior of the vehicle 12 and can be deployed in whole or in part as a ballistic barrier or as a ram for disabling a target vehicle without damaging the police/military vehicle 12 having the deployable plates mounted thereon. In the closed position the defense barriers 14 also prevent gunfire or shrapnel from damaging the engine compartment and vehicle tires. The defense barrier 14 may also include flashing light strips 22 and/or halogen lights 20 on the outer surface of the armored shield 16. FIGURE 3 FIGURE 3 is a top view of the present invention 10 with the defense barrier 14 un-deployed and neatly folded against the side of a vehicle 12 so as to maintain a narrow profile and cover and protect substantially the tires and sides of said vehicle 12 from ballistic material and positioned so as not to obstruct the opening and closing of the doors 13. FIGURE 4 FIGURE 4 is a side view of the present invention 10 in the first deployment stage wherein the defense barrier 14 is deployed to a 90 degree angle utilizing lateral forces applied to push the hydraulic piston 28 along a slidable track 26. At the first stage of deployment the present invention 10 provides optimum strength for ramming or providing ballistic defense from large caliber/high velocity rifle fire. A user control unit 27 is provided to operate the functions of the defense barrier 14 and may be integral with the vehicle and or hand held remote units. FIGURE 5 FIGURE 5 is a top view of the present invention 10 in the second deployment stage. Shown is the defense barrier 14 pivoted into position and its inner clear ballistic panel 18 extended from its housing in the armored shield 16 utilizing forces applied by the extension of the shaft 32 from hydraulic cylinder 30 to provide for a larger area of protection and defense for personnel from most small arms/pistol fire. FIGURE 6 FIGURE 6 is a detailed top view of the present invention 10 un-deployed. The defense barrier 14 is neatly folded against the side of a vehicle 12 so as to maintain a narrow profile and cover and protect substantially the tires and sides of said vehicle 12 from ballistic material. Also shown is the pivot hinge 34 and its relation with the slide track mount 24 and the defense barrier 14. FIGURE 7 FIGURE 7 is a detailed side view of the present invention 10 in first deployment stage. Shown is the hydraulic piston 28 comprising a cylinder 30 and a shaft 32 with the cylinder having a first end 36 slidably fastened to the slide track 26 and a second end 38 through which the shaft 32 extends and retracts. At the first stage of deployment the present invention 10 provides optimum strength for ramming or providing ballistic defense from large caliber/high velocity rifle fire. FIGURE 8 FIGURE 8 is a detailed top view of the present invention 10 in second deployment stage. The defense barrier 14 is deployed and its transparent ballistic shield 18 extended from its housing within the armored shield 16 by the hydraulic piston 28 to provide for a larger area of protection and defense for personnel from most small arms/pistol fire. The piston shaft 32 has a first end 40 that is acted upon and travels within the hydraulic cylinder 30 and a second end 42 that is mounted to the transparent shield 18 wherein extension and retraction thereof is accordingly responsive to the action of the shaft 32. FIGURE 9 FIGURE 9 is a detailed perspective view of the present invention in 10 first stage of deployment. Shown is the track mount 24 secured to the vehicle 12 and having a slidable track 26 extending longitudinally therein for receiving a pivoting cylinder slide mount 44 disposed on the first end 36 of the cylinder 30. The track mount 24 has a first end 46 disposed proximal the end of the vehicle 12 and a second end 48 that terminates prior to reaching the door in order to avoid interfering with the function thereof whether or not the defense barrier 14 is deployed. The physical pivoting connection between the track mount 24 and the defense barrier 14 is provided by the pivot hinge 34 disposed at the first end of said track mount 24. The armored shield 16 has a first end 50 pivotally engaged with the pivot hinge 34 and a distal second end 52. FIGURE 10 FIGURE 10 is a perspective view of the present invention 10 in second stage of deployment whereby it is best suited for providing a larger field of protection to personnel from most small arms fire. The transparent ballistic shield 18 is typically composed of Lexan and is deployed outward due to force applied by the hydraulic piston 28. The armored shield 16 has a hollow interior portion defining a housing 56 in which the ballistic shield 18 resides and travels therethrough thus resulting in a front armored plate 60 and a spaced apart rear armored plate 62 with the housing 56 and ballistic shield 18 disposed therebetween. The shaft 32 is fastened to the ballistic shield 18 with a shaft pivot mount 58 disposed on the second end 42 thereof. Extension of the hydraulic shaft 32 extracts the ballistic shield 18 from its housing 56 through the open second end 52 of the armored shield 16. Corresponding slots 61 in the armored plates 60,62 form a viewing and firing port 64 to enable personnel to view through the defense barrier 14 without exposing themselves and to fire therethrough when the ballistic shield 18 is extended. FIGURE 11 FIGURE 11 is a diagram of the ballistics of the defense barrier 14 comprising the front armored plate 60 and the rear armored plate 62 of the armored shield 16 with the ballistic shield 18 (preferably fabricated of Lexan 19) disposed therein and the defense provided from small arms pistol fire 66, magnum pistol fire 68, medium rifle fire 70 to high velocity/armor piercing rifle fire 72 in its first stage of deployment. FIGURE 12 FIGURE 12 is a topographic view of the present invention 10 having radar identification and warning system 74 being used during deployment while in pursuit of a target vehicle . Shown is the present invention having radar 76 which sends out a radar sensor 78 to locate pedestrians 82 who may be entering harms way and warn them with an audible alarm 80. FIGURE 13 FIGURE 13 is a perspective view of optional equipment of the present invention 10 with the rear defense barrier 88 deployed. Shown is a flip down table top 90 attached to the rear barrier of the present invention. Thumb screws secure the table top in a closed position. The thumb screws are turned to release the hingedly attached table for use. FIGURE 14 FIGURE 14 is a perspective view of optional equipment of the present invention 10. Shown is the optional flip down table top 90 attached to the rear barrier 88 in a flipped down position. Thumb screws 94 secure the table top 90 in a closed position when secured in their respective locking ports 96. The thumb screws 94 are turned to release the hingedly 92 attached table 94 for use. FIGURE 15 FIGURE 15 a perspective view of optional equipment of the present invention 10. Shown is the optional marquee screen 98 having a weather resistant roof and screened side walls that can be fully closed in or partially rolled up. The device protects the user from sun or inclement weather conditions.