Harriet Tubman, another black woman involved in intelligence collection for the Union, is well known for her activities with the underground railroad. Her intelligence activities, however, are well documented. Tubman, often referred to by her contemporaries as "Moses," is best known for the numerous trips she made into the south to free relatives and friends and bring them to safety. Her last trip took place in 1860. With the advent of the fighting, she spent the early years of the war assisting with the care and feeding of the many slaves who had fled to Union-controlled areas.