Each use finds food for a number of men equal to ten men plus the experience level of the ranger in 1903. For example, a ranger with experience level 2 in 1903 would find food for 12 men. In mountain terrain, the amount of food found is halved. In desert, the amount of food found is quartered. Food reduces the monthly maintenance costs of all units by 1 gp.
Excess food provides no further reduction.
To receive the food reduction, a unit must be in the ranger's inventory. For example, suppose a ranger with 10 peasants 12 soldiers and experience level 8 in 1903 used 1903 twice in a wilderness forest province. The ranger would find food for 36 men. Having only 22 men in his command, their maintenance costs for the month would be reduced by 22 gp. The excess 14 food would go to waste.