Welcome to the War of the Worlds mod
"We know now that in the early years of the twentieth century this world was being watched closely by intelligences greater than man's and yet as mortal as his own....With infinite complacence people went to and fro over the earth about their little affairs, serene in the assurance of their dominion over this small spinning fragment of solar driftwood which by chance or design man has inherited out of the dark mystery of Time and Space.
Yet across an immense ethereal gulf, minds that are to our minds as ours are to the beasts in the jungle, intellects vast, cool and unsympathetic, regarded this earth with envious eyes and slowly and surely drew their plans against us. In the thirty-ninth year of the twentieth century came the great disillusionment. It was near the end of October....On this particular evening, October 30th, the Crossley service estimated that thirty-two million people were listening in on radios…."
To guarantee the Martians show up, begin as the USA and play normally up until October, 1938. It is around this point the broadcast event should fire, choose the bottom option (called "Its only a matter of time"). Wait about a month and the Martians should begin their invasion.
To play the Martians from the 1936 start choose the bottom option in the invasion event (called "We should try and make peace").
Choose your desired country and begin, the war itself should start immediately after loading into the game. Although this is the easiest method to start playing the mod I would still recommend going from the 1936 start so that you do not miss any flavor events.
Choose your desired country and begin, though be careful if you choose the United States as they are very close to capitulation. This is recommended for players who want to either have an even harder game as the humans, or want to experience the end game Martian events quicker.
For more information on individual factions, please reference the in-game hint screens