Ovid once again. 'Militat omnis amans et habet sua castra Cupido' 'Every lover serves as a soldier and Cupid has his own camp.' (Amores, 1.9) Ovid was very fond of likening love to war. The lover keeps watch for his girl, the soldier for his general. But also, he envisages love as something of a battle. It is a metaphor he weaves through several poems and very wittily.