Title: History of the Dallas Cowboys
Content:  able to beat the Indianapolis Colts. They responded by routing the Colts 42–7 to win the NFC East and make the playoffs for the first time since 2009. Their final regular-season game was on the road against the Redskins, where the Cowboys won 44–17 to finish the season at 12–4, the #3 seed, and undefeated in away games. They also finished December 4–0 which was huge after they had struggled in the month of December during recent years. In the Wild Card round of the 2014–15 NFL playoffs the Cowboys hosted the sixth-seeded Detroit Lions. The Lions got off to a hot start going up 14–0 
Title: 2014 Dallas Cowboys season
Content:  The Dallas Cowboys now lead the all time Head-to-Head match-up against the Detroit Lions (14-12). The Cowboys also lead the all time playoff match-up against the Lions (2-1). This is the first time in franchise history that the Cowboys have won a post-season game when trailing by 10 points or more at half time. At the time, with this win over the Lions, the Cowboys became the team with the most NFL playoff wins with 34, one more than the Pittsburgh Steelers.
Title: Dallas Cowboys
Content:  the first time in franchise history, they posted back-to-back shutouts when they beat division rivals Washington (17–0) and Philadelphia (24–0) to end the season. In the process, the Cowboys clinched their second NFC East title in three years as well as the third seed in the NFC Playoffs. Six days later, in the wild-card round of the playoffs, Dallas played the Eagles in a rematch of week 17. The Cowboys defeated the Eagles for the first Cowboys' post-season win since the 1996 season, ending a streak of six consecutive NFL post-season losses. Dallas ended their playoff run after a hard divisional playoff loss to the Minnesota Vikings.
Title: 2008 Dallas Cowboys season
Content:  The  Dallas Cowboys season was the franchise's 49th season in the National Football League. The season ended when the Cowboys were blown out by the Philadelphia Eagles 44–6 in week 17, their worst loss since the 1985 Chicago Bears came to Texas Stadium and beat the Cowboys 44–0. It was the last season the Cowboys played at Texas Stadium; they moved to Cowboys Stadium in 2009. Despite entering the last month of the season four games above .500, they failed to make the playoffs for the first time since 2005, losing three of their last four games and finishing with a 9–7 record.
Title: History of the Dallas Cowboys
Content:  1st quarter turnovers along with Cooper's first touchdown as a Cowboy they seemed poised to make it four in a row. However, they were shutout in the second half of the game and lost 28–14. This brought them to 3–5. The trade for Cooper did pay off as the Cowboys returned to the playoffs after winning seven of their final eight games, earning the NFC East title with a 10–6 record. The Cowboys defeated the Seahawks 24–22 in the Wild Card round, notching their fourth playoff win since 1995, but lost to the eventual NFC Champion Los Angeles Rams 30–22 in the Divisional round.
Title: History of the Dallas Cowboys
Content:  Panthers 33–14, dropping their record to 3–8. In the next game on Monday Night Football, the Cowboys defeated the Washington Redskins 19–16, which proved to be their last win of the season and their only win without Romo as starter. In Week 14, the Cowboys lost to the Green Bay Packers 28–7. In Week 15, the Cowboys were eliminated from playoff contention with a 19–16 loss to the New York Jets in a Saturday night edition of Thursday Night Football. After that, the Cowboys lost to the Buffalo Bills 16-6 and then lost against the Redskins 34–23 to finish the regular season with a record of 4-12 and a last place finish in the NFC East. The Cowboys went 3–1 with Romo as the starting quarterback, but they were 1–11 in all of their other games.
Title: 1982 NFL season
Content:  1993. ; This would be the final playoff win in Cowboys' coach Tom Landry's career. It would be the Cowboys last playoff victory until 1991. After appearing in 10 of the previous 13 NFC Championship games, this would be Dallas' last appearance until 1992. Until this season, no team ever reached the post-season with a losing record. The Cleveland Browns and Detroit Lions both made playoff appearances with 4–5 records. It would be 28 years before another team with a losing record would make the post-season (however, this would be accomplished in a full season). The postseason would mark several "firsts" and "lasts" for several teams and players:
Title: History of the Dallas Cowboys
Content:  touchdowns. An all-around better performance by the team allowed them to win 33–20. After beating the Detroit Lions at home, the Cowboys lost a close Thanksgiving Day game to the New Orleans Saints. The Cowboys next defeated the Indianapolis Colts on the road 38–35 on an overtime field goal to retain faint playoff hopes. However, a home loss to the Philadelphia Eagles mathematically eliminated the Cowboys from playoff contention. Week 15 saw the Cowboys beat the hapless Redskins 33–30. The Cowboys then lost a meaningless game to the Arizona Cardinals and followed that with a meaningless win over the Eagles to end their season at 6–10.
Title: 2007 Dallas Cowboys season
Content:  also clinched a playoff berth. Hall of Fame/Former Cowboy QBs Roger Staubach and Troy Aikman were in attendance as honorary captains, along with the commemoration of the Super Bowl anniversaries of the '77 Cowboys & the '92 Cowboys. The Cowboys won the 10–1 duel with the win and improved to 11–1 while the Packers fell to 10–2. This is the last time to date that the Cowboys have beaten have the Packers at home, as the two teams would not meet in Dallas again until 2013, and the Packers have won four straight in Dallas as of 2019. For Tony Romo, he ended this part of the season with a franchise-best 33 touchdown passes.
Title: 2009 Dallas Cowboys season
Content:  The 2009 Dallas Cowboys season was the 50th anniversary for the team in the National Football League. It was the team's first season playing at Cowboys Stadium. Their victory over the Oakland Raiders on November 26 extended their Thanksgiving winning streak to four in a row and also ended a three-game losing streak to the Raiders. They also ended the Saints' bid for a perfect season after a 13–0 start with a 24–17 victory on December 19, 2009. The Cowboys earned a playoff spot on December 27 after beating the Washington Redskins 17–0. On January 3, 2010, the Cowboys clinched their division with a win over the Philadelphia Eagles, 24–0. In the wild-card round of the playoffs, the Cowboys once again defeated the Eagles, 34–14, to score their first playoff win since December 28, 1996 and finish the season sweep of all three games played against Philadelphia. They lost 34-3 to the Minnesota Vikings in the divisional round of the playoffs, ending their season.

Question: when did the dallas cowboys win their last playoff game?
Answer: 2014.
2016.