Game board ink friendly
If you want to print this whole game board (hex grid), you will need multiple sheets of A4 or one A1. For A4 pages, look in the print window of the PDF viewer and there should be an option to print tiled pages. For a small game, you could just print one sheet of A4.
Use color pencils or markers to draw the outline of your battlefield, the urban areas and the forests on the printed game board.