The frontier / Kenneth Tam.

In 1881, explorers in the rocky mountains on either side of the Canada-U.S. border discovered gateways to a new planet. The British Empire and the United States quickly partnered to settle and exploit this rich, Earth-like world... Now it's 1919, and following their first mission on the new world, the men of the Royal Newfoundland Regiment are sent to the American Pacifica Territory, to assist with a new operation on the grasslands. Partnered with the buffalo soldiers of the 25th United States Infantry, Waller, Smith, Emily, Caralynne and the b'ys must march out onto the American 'frontier'. But these lawless lands are full of unexpected foes, and the blue enemy has learned much from the Newfoundlanders' previous mission. New challenges await on the frontier...