Suicide among United States active‐duty Army soldiers rapidly increased over the past two decades. Using a sample of 322 soldiers from the Army STARRS study, the researchers examined if romantic relationship factors (i.e., hostile disagreements and relationship distress) were linked with suicidal thoughts in Army soldiers, and if these associations were moderated by a recent separation or divorce. Hostile disagreements and relational distress were both significantly associated with higher rates of suicidal ideation. These associations were significantly amplified in magnitude when in the context of a recent separation or divorce. Implications include novel assessment, prevention, and treatment efforts focused on romantic relationships that may reduce the likelihood of soldiers experiencing thoughts of suicide.