You might find this about what officers in the British Army carried in Spain.
John Kincaid in his book on his experiences during the Pennisular War against the French wrote the following, "A haversack on service is a sort of dumb waiter. The mess have a good many things in common, but the contents of the haversack are exclusively the property of its owner; and a well regulated one ought never to be without the following furniture, unless when the perishable part is consumed, in consequence of every other means of supply having failed, viz. a couple of biscuits, a sausage, a little tea and sugar, a knife, fork, and spoon, a tin cup, (which answers to the names of tea-cup, soup-plate, wine-glass, and tumbler,) a pair of socks, a piece of soap, a tooth-brush, towel, and comb, and half a dozen cigars."
In addition to this the officers and men both carried packs while actively campaigning. Edward Costello describes the contents of his pack as "two shirts, two pair of stockings, one pair of shoes, one pair of soles and heels, three brushes, box of blacking, razor, soap-box and strap, and also at the time an extra pair of trousers, a mess-tin, centre-tin and lid." He adds that each squad also had to carry four bill hooks that they passed around each day so no one man carried much more than another. This stuff with the rest of the equipment he carried were estimated to weigh 70 to 80 lbs. Costello was cobbler by trade and therefore also carried the tools of his trade to repair shoes, boots, and leather gear. He does mention that while getting off the transport in Lisbon harbor he "accidentally" dropped his portable anvil. A similar list is provided by a John Spencer Cooper of the 7th Fusiliers. He adds, pen, ink and paper, pipe clay, chalk, etc, two tent pegs.
John Kincaid in one of his books also describes a sleeping bag made from a blanket by folding it in half and sewing the bottom and half way up the side. He also states that in his oppinion dropping packs when going into combat is very bad idea because by the end of the day you could be a very long way from where you started and it could take days for mules and baggage train to find you and what mobility you lost in battle by carrying them was more than made up for by the comfort they provided at the end of the day.
One more item. In several of the journals I've acquired they make reference to dumping their "Trotter" packs at the first opportunity and replacing it with a French pack since it was more comfortable to wear and didn't have a cross strap tieing the shoulder straps together restricting the ability to breath.
I won't even begin to get into the general list of equipment/belonings taken to war by the officers of the British Army.
One last thought. I find it amazing that two hundred years ago the British Soldier went to war with 70-80 lbs. of stuff and today we pack the same weight. Something about that number must be magic.