Marches cannons mouth refers to a military strategy where soldiers move forward despite the risk of being attacked. Synonyms for this phrase include brave advance, courageous progression, and determined advancement. These terms all emphasize the bravery and determination of soldiers as they push forward towards their goal. Other synonyms might include bold offensive, fearless charge, or resolute assault. No matter the specific phrasing, these terms all convey a sense of bravery and determination in the face of danger, highlighting the heroism and selflessness of soldiers who are willing to risk their lives in service of their country.