dulce et decorum est pro patria mori

Latin quotation from Horace

dul·​ce et de·​co·​rum est pro pa·​tria mo·​ri ˌdu̇l-ˌke-et-de-ˈkȯr-u̇m-ˌest-prō-ˌpä-trē-ˌä-ˈmȯ-ˌrē 

: it is sweet and proper to die for one's country