Although they lived along the coast, the Krus refused to take part in Trans-Atlantic slave trade and they fought viciously against slave trader who made attempts to capture a Kru.
Mostly agriculturists like their interior relatives the Krahn, the Kru also engaged in trade, migrant labor, and seafaring.
The Kru languages include many subgroups such as Kuwaa, Grebo, Belle, Belleh, Kwaa and many others.
By the time of their earliest recorded encounters with the Portuguese in the 1400s, there were three distinct yet similar groups inhabiting what came to be known as the Kru Coast: The Grebo, literally meaning "Those Who Made It Across the Water," the Sapo, and the Kru.Unfortunately, as noted by Fisiak, there is very little documentation on the Kru and associated languages.The origins of Kru people are still historically unknown.They lived mostly in five large towns along the coast: Nana Kru, Settra Kru, King Willie Town, Fishtown, and Sasstown, the largest and most powerful. The Grebos were centered around Grand Cess, Cape Palmas, and Tabou, with power concentrated in Grand Cess.Migrant workers were recruited in and around these three centers.