Many different cultures have utilized some form of hammocks... The Greeks used them when invading Persia. The Prussians used them for nobility to relax while out on hunts and such. The Japanese used a form of hammock for sitting in small workshops. The vikings used them to transport wounded men on their boats. Hell even some original beds used hammock tech as they would use a wood frame with woven ropes to sleep on. Many cultures around the equator used hammocks of different sorts to sleep and rest in. It was easy to use a wrap of material to carry your gear in then tie that up to a couple trees and sleep on it. Maybe not fancy but hammocking all the way!
Funny note. Many sailors hated sleeping on hammocks on smaller ships as it made them seasick. The hammock wouldn't rock with the boat so the visual rocking was rough on the more sensitive sleepers.