In the southern regions, she witnessed key battles such as those at Ocoa, Las Matas, Cambronal, and the third confrontation at Cachimán.
During these campaigns, Montás tended to wounded soldiers and provided logistical support, using her personal resources to supply rations to the troops stationed along the borders.
On several occasions, she donated household items, including bedsheets, to be repurposed as bandages for the injured in the liberating army.
Following the execution of her husband in 1855 on the orders of President Pedro Santana, Montás relocated to Higüey, where she lived in poverty until her death on October 19, 1895.
[2] Rosa Montás was buried in the church of Higüey, though her grave remains unmarked, with no tombstone to honor her legacy.