An example of similes in Dulce Decorum Est is in the first line: 'Bent double, like old beggars under sacks' this suggests that soldiers are so tired that they can be compared to old beggars
dulce et decorum est is about the reality of war and how it isn't actually sweet and fitting to die for your country.
"Dulce et Decorum est Pro patria mori" means "It is sweet and fitting to die for...
In Wilfred Owens's Poem, "Dulce et Decorum est Pro patria mori" translates into "It is sweet and right to die for your country" it's taken from an ancient Roman poem by Horace, and it is in Latin.
Latin. It means it is sweet and proper. The rest of the phrase, pro patria mori, means to die for one's country. So in all, "it is sweet and proper to die for one's country.