Bampfylde’s proud career in the Somerset Militia saw him rise steadily through the officer ranks from Major (1758) to Lieutenant Colonel (1761) to Colonel (1767). Long marches and a month annually of militia training were suffered into the 1770s and at low pay – ‘My Militia pay will never reimburse my military expenses, as we are so liberal as to bestow two-thirds of it on our subalterns.’