Proficisci ad bellum, to depart for the war.

http://lila-erc.eu/data/lexicalResources/LewisShort/id/LexicalSense/n5147.33 an entity of type: LexicalSense

Proficisci ad bellum, to depart for the war. 
Proficisci ad bellum, to depart for the war. 

data from the linked data cloud