Book 7.601-610
We learn about the custom of declaring war, which the Romans continued, with the twin gates of War.
Mos erat Hesperio in Latio, quem protinus urbes
601
Albanae coluere sacrum nunc maxima rerum
602
Roma colit, cum prima movent in proelia Martem,
603
sive Getis inferre manu lacrimabile bellum
604
Hyrcanisve Arabisve parant seu tendere ad Indos
605
Auroramque sequi Parthosque reposcere signa.
606
Sunt geminae Belli portae (sic nomine dicunt)
607
religione sacrae et saevi formidine Martis;
608
centum aerei claudunt vectes aeternaque ferri
609
robora, nec custos absistit limine Ianus:
610