Both service members and their romantic partners deal with mental health struggles as a result of military life. Despite the vast research done on mental health within the military, little is known about how both service members and their partners give and receive social support within online forums. A thematic analysis of posts made within an online forum that both service members and their partners had access to yielded 5 different themes: encouraging help-seeking, seeking and expressing solidarity, filling time meaningfully, sharing personal experiences, and engaging in self-care. These results show the ability of online forums to be useful tools to cope with mental health struggles, and also how people within online forums offer a lot of emotional and informational support when it comes to mental health. By showing the benefits that social support has within online forums for those struggling with their mental health, this thesis will contribute to further research on similar topics.