The plane in the picture is called a PBY Catalina used in world war 2 from 1936 to 1957.
The primary users of this plane were the United States Navy, United States Army Air Forces,
Royal Air Force, And the Royal Canadian Air Force.
There were many planes used in WW1 like the british 2 seater Bristol Type 22 fighter
used from 1916-1930's,
And the Siemens-Shuckert D.IV a single seat German fighter plane
introduced in 1918 late in WW1.