LitCharts assigns a color and icon to each theme in A Farewell to Arms, which you can use to track the themes throughout the work.
War
Love and Loss
Reality vs. Fantasy
Self vs. Duty
Manhood
Religion
Summary
Analysis
The next night, Henry's unit heads on its way to serve during a battle at the front. As they pass the British Hospital, Henry forces the driver of his car to stop. He runs in to see Catherine, and tells her that he will be in "a show" and that she shouldn't worry. Catherine gives him a St. Anthony medal for luck.
By stopping the vehicle to visit Catherine before going to battle, Henry displays his growing feelings for Catherine. Though neither of them is religious, they do turn to religion in the form of the St. Anthony medal during extreme circumstances.