Alway Loyal to the Plan.

Semper Fi.

Semper fidelis (Latin pronunciation: [ˈsɛm.pɛr fɪˈdeː.lɪs]) is a Latin phrase that means "always faithful" or "always loyal". It is the motto of the United States Marine Corps, usually shortened to Semper Fi. It is also in use as a motto for towns, families, schools, and other military units.

https://en.wikipedia.org/wiki/Semper_fidelis