The 4-3 defense is a popular formation used in American football, consisting of four defensive linemen and three linebackers. This setup allows for a strong front against both the run and pass, providing flexibility in defensive strategies. The linemen focus on stopping the run and pressuring the quarterback, while the linebackers cover short passes and support the run defense. In a 4-3 defense, the alignment typically features two defensive ends and two defensive tackles. The three linebackers are positioned behind them, with one often acting as a middle linebacker. This formation is effective for teams looking to balance their defensive approach while maintaining coverage against various offensive plays.