noun, noun or participle which takes 'suru', intransitive verb
proceeding east; eastward advance
Often used for military advances, weather systems, or figurative progress eastward. The intransitive する form is common.
See also: 西進
台風は東進して日本に近づいている。
The typhoon is proceeding east and approaching Japan.
敵軍
The enemy forces are continuing their eastward advance.