Troops tend to be deployed in 'battalions' (commanded by a lieutenant colonel) as a more convenient size of military unit and, as such, colonels have tended to have a higher profile in specialist and command roles than as actual commanders of regiments.
An iamb /ËaÉªÃ¦m/ or iambus is a metrical foot used in various types of poetry. Originally the term referred to one of the feet of the quantitative meter of classical Greek prosody: a short syllable followed by a long syllable (as in delay).
That rhythm is measured in small groups of syllables; these small groups of syllables are called  feet . The word  iambic  describes the type of foot that is used (in English, an unstressed syllable followed by a stressed syllable). The word pentameter indicates that a line has five of these feet.