From Longman Dictionary of Contemporary Englishsomebody’s postsomebody’s postPLACEthe place where a soldier, guard etc is expected to be in order to do their jobat somebody’s post By 5 am the soldiers were already at their posts. No one was allowed to leave their post. → post
Examples from the Corpus
leave ... post• Even if Dole leaves his post, there is no guarantee Lott would win a vote among Senate Republicans for majority leader.• There he would rejoin the regiment that he had left on being posted to Britain.• She left the post when she was named by Gov.• Because utmost vigilance was required of him, he was reluctant to leave his post for any length of time.• I thought that Duncan Nichol was leaving his post as chief executive of the health service in June. 