The High Crusade Author:Poul Anderson In the year 1345, as Sir Roger Baron de Tourneville was gathering an army to join Edward III in the war against France, a most astonishing event occurred: a huge silver ship descended through the sky and landed in a pasture beside the little village of Ansby in northeastern Lincolnshire. — The Wersgorix were quite expert at taking over planets, ... more »and, from orbit, had determinet that this one was suitable. They initiated standard world-conquering procedures. This is, one of their crew showed himself - a sight that customarily terrified backward natives.
The tactic had never failed. The natives were subdued or wiped out leaving the Wesgorix free to extablish a base and facilitate future conquest.
This time, there were not up against primitives. They'd launched their invasion against ENGLISHMEN!
... Also Englishwomen, children and olf folk, who were duly horrified by the demonic blue-skilled creatures. Not even the friar's reminder that sorcery could not harm a good Christian calmed the throng.
Bur Sir Roger was undaunted. When the monster dared attact, that brave novelman led his army charging into the ship, cavalry and foot fighting a bloody hand to hand combat they knew so well. The Wersgorix hadn't seen this in centries.
In the end, only one alien was left alive - and Sir Roger's grand vision was born. He intended for the creature to fly the ship, which was large enough to whole of Ansby's entire population- and all of the comforts of home,first to France to aid Edward III, then to the Holy Land to vanqish the infidel.
Instead, the treacherous alien locked the ships controls on a course for one of the Wersgorix's conquered planets. Sir Roger's crusaders found themselves fighting against the strangest infidels they'd ever seen.« less