ichi-ritsu. More informally, in legal jargon 前文 "preamble" and 全文 "full text" are both pronounced zen-bun, so 前文 may be pronounced mae-bun for clarity, as...

nationalist regiment at the region of Frontal Wen Family's Platform (Qianwenjiatai, 前文家台). Under the cover of intense artillery bombardment, the battle was over...