“Cameron's documentary shows him embarking on his own expedition to explore the wreck of the Bismarck.”
“He came to Mexico by way of Chihuahua, accompanying the traders from Jonesborough, in the first and only expedition across the immense prairies.”
“She organized a large expedition for the discovery of the sources of the Nile.”
expediency
(uncountable) The quality of being fit or suitable to effect some desired end or the purpose intended; suitability for particular circumstance or situation.
(uncountable) Pursuit of the course of action that brings the desired effect even if it is unjust or unprincipled.
“Finally, it reflects upon the limits of culture's expediency for this purpose.”
“This excessive number of field stations appears to exist only as an expediency for upgrading supervisory personnel.”
“They are not just men sacrificed to expediency, they are not men too civilised for an uncivilised world.”
expedience
(uncountable) The quality of being fit or suitable to effect some desired end or the purpose intended; propriety or advisability under the particular circumstances of a case.