marshal / martial are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
marshal: (noun) a law officer having duties similar to those of a sheriff in carrying out the judgments of a court of law. (noun) (in some countries) a military officer of highest rank. (verb) place in proper rank. (verb) arrange in logical order. (verb) lead ceremoniously, as in a procession.
martial: (noun) Roman poet noted for epigrams (first century BC). (adjective) of or relating to the armed forces.
marshal: m·AA·r·sh·ah·l
martial: m·AA·r·sh·ah·l
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)