Hadrian's Camp Food
1) Fry up some bacon.
2) Put it on a plate with some cheese.
3) Pour a big glass of wine. This wine must come from a box or enormous jug. The specified wine in the text is posca, the worst of the worst, even worse than acetum on the ancient-crappy-wine-scale.
4) Eat and drink and feel the love of the troops for you grow and grow.
So, this is how Hadrian made the troops love him! (Uh, and according to the very next sentence it is also because Hadrian gave the soldiers lots of gifts. The author of the Historia Augusta is a wonderfully snarky devil!)
There is a true kernel of wisdom here: if you eat bacon and cheese with people while drinking wine and then give them lots of gifts, they will love you! Hooray!