The biggest games on Michigan’s schedule have already been circled. There are several must-win matchups for Jim Harbaugh and company in 2019 that will headline the season.

But there are a few opponents on the Wolverines’ schedule who won’t draw much attention but could still cause some issues. Better known as “trap games” there are three under-the-radar games that could derail Michigan’s hopes of a potential B1G title and trip to the College Football Playoff.

Yes, we know games against Wisconsin, Penn State, Michigan State, Notre Dame and Ohio State are the five biggest on the slate. But here are the three opponents Michigan will have to be extra careful with this fall.

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vs. Army (Saturday, Sept. 7)

This is an early-season non-conference matchup that could really pose some problems for Michigan. Army is coming off an 11-2 season and its triple-option offense can be troublesome for just about any defense it faces, especially with 1,000-yard rusher and passer Kelvin Hopkins Jr. returning under center.

Michigan doesn’t see the triple-option in the B1G, and without much knowledge, it will force Don Brown’s defense to be even more disciplined. The positive is that the game comes early in the year, so the Wolverines could use fall camp to prepare for some of the looks the Black Knights will throw their way offensively.

Last season, Army took Oklahoma to overtime before falling 28-21 in Norman, and the Sooners eventually reached the College Football Playoff and had Heisman Trophy winner Kyler Murray at quarterback. This won’t be a game Michigan can take lightly.

vs. Iowa (Saturday, Oct. 5)

We all know Iowa isn’t truly an “under-the-radar” team coming into the fall, but this matchup probably won’t get as much hype as the four big ones on Michigan’s schedule. While the Hawkeyes tend to play dream-crusher at Kinnick Stadium, they have all the pieces to pull of a major road upset this fall.

A.J. Epenesa is one of the top defensive lineman in college football and could potentially be a top five pick in the NFL Draft. Nate Stanley will be a senior this fall and is a third-year returning starter. Iowa did lose its best offensive weapons in Noah Fant and T.J. Hockenson, as well as several key defensive pieces, it’s still got enough in the tank to win some big-time games.

Iowa has actually dominated the head-to-head series against Michigan recently, winning the last two games and five of the previous six matchups. The nice thing for Harbaugh’s bunch is that the showdown with the Hawkeyes is sandwiched between games against Rutgers and Illinois, meaning they can spend plenty of time preparing.

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at Indiana (Saturday, Nov. 23)

You might be scratching your head at this game considering Indiana has lost 23 straight games to Michigan, failing to win in the series since 1987. Yet, for some reason, the Hoosiers have hung tough with the Wolverines in the Harbaugh era.

Each of Michigan’s last two trips to Bloomington have resulted in overtime wins, much closer games than expected. And with IU having a new-look offense and Peyton Ramsey under center, Stevie Scott, Sampson James and Cole Gest in the backfield and Nick Westbrook at receiver, the Hoosiers could be just as tough in 2019.

This is the ultimate trap game on Michigan’s schedule. The Wolverines make the trip to Memorial Stadium in-between a pair of rivalry games — Nov. 16 against Michigan State and Nov. 30 against Ohio State. Both of those will be must-wins for Harbaugh in his fifth season.

While Indiana doesn’t have the same talent level as Michigan, this game has caused problems for the Wolverines each of the last two years in Bloomington. This year would be as good of an opportunity as any for head coach Tom Allen to notch a signature win.