anabasis

1. (historical) A military march up-country, especially that of Cyrus the Younger into Asia.Examples: "During the French anabasis to Moscow he entered our service, made himself a prodigious favorite with the whole imperial family, and even now is only in his twenty−second year."; "‘I have a feeling that if we follow a scent of spring on the air with sufficient eagerness we’ll come to a south without snow more quickly than we think. Thalassa, thalassa. This is what the Greeks called an anabasis.’ They looked at him as if he were barmy."; "The Wordsworthian journey to the source […] is more of an amble than an anabasis or strenuous heroic quest."historical

2. (obsolete) The first period, or increase, of a disease; augmentation.obsolete