Title: History of the Seattle Seahawks
Content:  For the first time in franchise history, the Seahawks started a season as the defending Super Bowl champions. As such, they earned the right to host the NFL Kickoff Game, where they defeated the Green Bay Packers 36–16. Then in Week 2, they traveled to San Diego, where the Chargers defeated them by a score of 30–21. This was Seattle's worst defeat since a 23–13 loss to the Dallas Cowboys in Week 9 of the 2011 season. Then in Week 3, they returned home to face the Denver Broncos in a rematch of Super Bowl XLVIII. Seattle took a 17–3 lead going 
Title: History of the Seattle Seahawks
Content:  intended target on all four of Seattle's interceptions. The final score was Seattle 28, Green Bay 22. Thus Seattle became the first defending champion since the 2004 New England Patriots to return to the Super Bowl the next season. They also became the first NFC team since the 1997 Green Bay Packers to repeat as NFC Champions, the first team to go to consecutive Super Bowls as the #1 seed in the playoffs since the 1990–1991 Buffalo Bills, and the first NFC team to go to consecutive Super Bowls as the #1 seed in the playoffs since the 1982–1983 Washington Redskins.
Title: Seattle Seahawks
Content:  NFC Championship Games. They have progressed to three Super Bowls, losing 21–10 to the Pittsburgh Steelers at Super Bowl XL, defeating the Denver Broncos 43–8 for their first championship at Super Bowl XLVIII, and losing 28–24 to the New England Patriots at Super Bowl XLIX. NFL players Kenny Easley, Walter Jones, Steve Hutchinson, Cortez Kennedy, and Steve Largent have been voted into the Pro Football Hall of Fame primarily or wholly for their accomplishments as Seahawks. In addition, players Dave Brown, Jacob Green, Dave Krieg, Curt Warner, Jim Zorn, and Matt Hasselbeck have been inducted into the Seahawks Ring of Honor along with head coaches Chuck Knox and Mike Holmgren, radio announcer Pete Gross, and franchise owner Paul Allen.
Title: 2014 Seattle Seahawks season
Content:  The Seahawks defeated the Panthers 31-17, becoming the first defending Super Bowl champion to win a playoff game since the 2005 Patriots, and advanced to their second consecutive NFC Championship game. They hosted the Green Bay Packers, who defeated the Dallas Cowboys 26-21.
Title: History of the Seattle Seahawks
Content:  On Sunday, February 1, 2015, in Super Bowl XLIX, the Seahawks faced off against Tom Brady and the New England Patriots, seeking to become the first team to win two consecutive Super Bowls since the Patriots themselves won Super Bowl XXXVIII and Super Bowl XXXIX following the 2003 and 2004 seasons, respectively. After a scoreless first quarter, both teams scored two touchdowns in the second quarter, and the game was tied 14–14 at halftime. In the third quarter, the Seahawks scored a field goal and a touchdown to take a ten-point lead, which they held going into the fourth quarter. However, 
Title: Seattle Seahawks
Content:  As of the end of the 2020 season, the Seattle Seahawks have competed in 45 NFL seasons, dating back to their expansion year of 1976. The team has compiled a (.519) regular-season record and a  (.486) record in the playoffs, for an overall record of  and a .517 winning percentage. Seattle has reached the playoffs in 19 separate seasons, including in the 2005 season when they lost Super Bowl XL to the Pittsburgh Steelers, the 2013 season when they defeated the Denver Broncos to win Super Bowl XLVIII, and the 2014 season when they lost Super Bowl XLIX to the New England Patriots. In the 2010 season, the Seahawks became the first team in NFL history to earn a spot in the playoffs with a losing record (7–9, .438) in a full season; this was by virtue of winning the division. The Seahawks would go on to defeat the reigning Super Bowl champion New Orleans Saints in the Wild Card round, becoming the first team ever to win a playoff game with a losing record. Until Week 7 of the 2016 season against the Arizona Cardinals, the Seahawks had never recorded a tied game in their history.
Title: Super Bowl XL
Content:  The Seahawks became the first team to advance to the Super Bowl without playing a division champion in the playoffs (later matched by the Colts in 2009, Steelers in 2010, and the Seahawks again in 2013, with the 2013 Seahawks being the only one of the four to win the Super Bowl). Off a first-round bye, Seattle defeated the sixth-seeded Washington Redskins, 20–10, before eliminating the fifth-seeded Carolina Panthers, 34–14, in the NFC Championship Game. These were Seattle's first playoff victories since the 1984 season when they defeated the Los Angeles Raiders 13–7, when the team was still in the AFC (the Seahawks were 
Title: History of the Seattle Seahawks
Content:  win their final 5 games in convincing fashion. Included in the run were a 31-14 road victory over the Dallas Cowboys on Thanksgiving, a 37–0 shutout of the Los Angeles Raiders on Monday Night Football and a season ending 41–16 victory over the Super Bowl bound Denver Broncos. Despite a 10–6 record, the Seahawks failed to qualify for the playoffs due to a tiebreaker. They were the only team to beat both Super Bowl teams (Denver and the New York Giants) in 1986. 1987 began with great expectations and predictions of a Super Bowl appearance. The Seahawks had won a lottery for the first pick in a supplemental draft, and they selected Oklahoma University 
Title: Seattle Seahawks
Content:  Super Bowl at 11–5, but they still lost 3 out of their last 4 games and lost their chance to win the NFC West. A likely explanation for their sloppy finish is because many of their players were injured late in the season. After defeating the Philadelphia Eagles 17–9 in the Wild Card game, they lost to the Green Bay Packers in the Divisional round, failing another attempt at a second Super Bowl. The 2020 season saw the Seahawks win their first five games, a franchise-best for a start to a season. Despite the Seahawks losing three of their next four games, the Seahawks finished off 
Title: Seattle Seahawks
Content:  In the 2013 NFL season, the Seahawks continued their momentum from the previous season, finishing tied with the Denver Broncos for an NFL-best regular season record of 13–3, while earning the NFC's #1 playoff seed. Their 2013 campaign included big wins over the Carolina Panthers, New Orleans Saints, and the San Francisco 49ers. Six Seahawks players were named to the Pro Bowl: Quarterback Russell Wilson, center Max Unger, running back Marshawn Lynch, cornerback Richard Sherman, free safety Earl Thomas, and strong safety Kam Chancellor. However, none of them were able to play in the Pro Bowl, as the Seahawks defeated the New Orleans Saints 23–15 and the San Francisco 49ers 23–17, in the playoffs to advance to Super Bowl XLVIII against the Denver Broncos. On February 2, 2014, the Seahawks won the franchise's only Super Bowl Championship, defeating Denver 43–8. The Seahawks' defense performance in 2013 was acclaimed as one of the best in the Super Bowl era.

Question: when was the last time the seattle seahawks won the superbowl?
Answer: 2013.