stand one's ground

/S T AE1 N D W AH0 N EH0 S G R AW0 N D/
verb
  1. 1

    To hold a position in battle.

  2. 2

    To maintain or stick by an opinion or position; to remain resolute in the face of opposition.

    โ€œThey expect their opponents to stand their ground on the issue.โ€

Source: https://en.wiktionary.org/wiki/stand%20one's%20ground