Here is a graphics hack which changes the general landscape and background from the plain black to one with grass and updated object sprites adding more detail the the game.
Bokosuka Wars (Japan).nes - NOINTRO
CRC32: 196AFC68
MD5: C895B3D16BCCF3646D01B786DF7B8F27
SHA-1: 421E2882FB476BE347DCBB924A165306E57A66C3
SHA-256: 9D85C934E182378630E46A9F73D22472C368287A400F25D518451886CFCB43F4