English: Colonial members of the Polizia Africa Italiana (PAI), wearing their knife called "billao". Image taken from an old 1938 book of "Africa Orientale Italiana". Image is not copyrighted because more than 70 years old. I have done a photo with my digital Kodak, and later enlarged it with my software.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.