Personal opinion

The 1985 Chicago Bears....just a guess

Steelers

prolly green bay

I think the 1985 bears but I was too young to see any teams in the 70's so I can't comment on those.

if your going to base it on stats and records you would have to say the 2000 Ravens they broke most of the records that plus 85 Bears had and hold the record for fewest points allowed in a season 165

it has to be the Chicago Bears, as much as i hate that team. they have a history of the best MLBs of all time. Not to mention the 85 bears were the most dominating defense of all time.

Bears, Steelers then Cowboys

those are my top 3

buccaneers

or


ravens

1985 Bears, the monsters of Midway

76 Pittsburgh Steelers my friend

a great defense doesn't just play great...they invoke fear. no defense, in the history of the league put more fear in their opponents hearts than the Bears. you couldn't do anything
against them:run or pass, period. that entire defense damn near would go to the Pro Bowl.

The 85' bears.

85' Bears, 00' Ravens, 70's Steelers

This year's Bears just could possibly squeek by them all when it is all said and done. They have proven they are great and can carry the team. Great def finds a way to hold off the other team and create turnovers. that's what they do.

1999 ravens

Steelers with out a doubt.

steelers without a doubt. the toughest defense since the 70's

06 Bears, wouldnt have said that before last night.

I love the '75-'76 Steelers but I'm going with the '85 Bears

Chicago Bears either the '85 or the '06.

Steelers

1985 Bears by far.

1976 Steelers

By matter of records... The 1927 Giants went 12-1, and allowed only 13 points total the entire year. That's 11 Shut outs, including the Championship game. Ive done the research... Nobody even comes close to that kind or power on defense.
By the way, the one loss came to Cleveland 6-0. That's sad, but the defence still pounded them.

the1985 chicago bears.