Hastor: is fortunate to be located adjacent to a rare Barsoomian forest rich in skeel (see ‘trees’) ; it is“another Heliumetic city, far to the south-west. Kantos Kan thought that the docks there, in addition to their regular work, would accommodate at least six battleships at a time. As he was commander-in-chief of the navy, it would be a simple matter for him to order the vessels there as they could be handled, and thereafter keep the remodelled fleet in remote parts of the empire until we should be ready to assemble it for the dash upon Omean.” (GM XVIII)
The navy of Helium is superior to all other nations upon the Red Planet . . .
“In his explanation I recognized a trick of gearing that . . .the First Born had stolen it from the ships of Helium, for only they are thus geared. And I knew too that Xodar spoke the truth when he lauded the speed of his little craft, for nothing that cleaves the thin air of Mars can approximate the speed of the ships of Helium.” (GM XIII)
“From the high pinnacle of their egotism the First Born had been plunged to the depths of humiliation. Their deity was gone, and with her the whole false fabric of their religion. Their vaunted navy had fallen in defeat before the superior ships and fighting men of the red men of Helium.” (WM I)
“The combined navies of Dusar, Ptarth and Kaol had been intercepted in their advance toward Helium by the mighty Heliumitic navy—the most formidable upon Barsoom, not alone in numbers and armament, but in the training and courage of its officers and warriors, and the zitidaric proportions of many of its monster battleships.” (TMM XIII)