After a lengthy cutscene in which Sofia tells her motives in aiding Baird in his mission, you start outside of the sewers and, after you knock a door, you see the Academy burning and a lot of dead Gears. Next, you go left downstairs and the Declassified Mission is at the right corner.
"Kilo Squad claimed to take Enfield Bridge, and defeat several Reavers, without additional support and despite lack of supplies."
Activating the Declassified Mission will leave you with little ammo, almost none at all, and without access to Longshots, meaning that you're gonna have to do some CQC to get through the enemies and to watch out for any additional Reavers from the flanks.
There'll be several turrets and outposts across the bridge. You can try flanking them but watch out for Wretches and Therons as they will try to ambush you. There might also be some Snipers and Grenadiers. After you're done with the first turret, several Reavers will attack you from the right side. You'll have little ammo so try using the turret to take them out. However, if they land, it is advisable to take cover and fire until they die. You might need to be patient.
Once all Reavers are out, some Flame Grenadiers will open a path for you. There'll be more turrets and Reavers; try taking the gunners out with grenades and then use the turrets to kill the Reavers or ambush them while they fire at your partners. Once you're done, walk towards the main gate which leads you to the next chapter.
Behind the first turret, at the destroyed part of the bridge, there's a COG Tag at the left side next to some rubble.
|Gears of War: Judgment Walkthrough|
|Gears of War: Judgment||Act I · Act II · Act III · Act IV · Act V · Act VI · Act VII|
|Act I||Old Town · Riverwalk District · Museum Gardens · Great Hall · Kashkur Wing · East Wing · Archives · Vaults|
|Act II||Enfield Bridge · Courtyard · R&D Labs · Monroe Commons · Atrium · Crash Site|
|Act III||Amador Park · Magadha Villa · Soleno Villa · Windward Way · Risea Estate · Guest Bungalows · Elliott's Mansion|
|Act IV||Fortress · Container Terminal · Motor Pool · The Cliffs · Central Base · Central Control · Beach|
|Act V||Wharf District · Parade Grounds · Upper State Street · State Street Rooftops · First Avenue Rooftops · Museum Square Rooftops · Overlook|
|Act VI||Grand Courtroom · Halls of Judgment · Terrace · North Entrance · Main Entrance · Great Staircase · Plaza for the Tyran Dead|
|Act VII||Reunion · Anybody Home? · Dead End · One Step Closer · Straight to the Top · A Few Complaints|