embattle vs mobilise

embattle

verb
  • To prepare or arm for battle; to equip as for battle. 

  • To arrange in order of battle; to array for battle. 

  • To be arrayed for battle. 

  • To furnish with battlements; to give the form of battlements to. 

noun
  • A merlon, or a single one of the series of solid projections of a battlement. 

mobilise

verb
  • To become made ready for war. 

  • To make something mobile. 

  • To assemble troops and their equipment in a coordinated fashion so as to be ready for war. 

How often have the words embattle and mobilise occurred in a corpus of books? (source: Google Ngram Viewer )