ospalhSo, »manoeuver« is an accepted variant.
Maneuver/manoeuvre must be the English word with the most spelling variants.
Wiktionary has
maneuver
maneuvre
manoeuver
manoeuvre
manœuver
manœuvre
Google ngram has seen some more:
manoueuvre,
manouver,
manouvre,
Misspellings, sure, but something that has appeared in print.
The only version i could think of not there is
manoueuver
