General Joe Stilwell's march/retreat from the Japanese through Burma took 20 days.
He covered 140 miles in that time, about 1/2 of his desired rate of travel.

http://findarticles.com/p/articles/mi_m0IAV/is_2_90/ai_76736958/pg_1?tag=content;col1
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May set off to explore without any sense of direction or how to return.