If you have ancestors who lived during the early years of the United States, some of your male ancestors probably served in the military. Many of them qualified for pension and other pay in the form of land grants or land bounties.
The newly formed country was short on cash but rich in unsettled land which was used to satisfy the need to compensate her veterans.
The book, Army and Navy pension laws, and bounty land laws of the United States by Robert mayo and Ferdinand Moulton does not include a copy of your ancestors land grant record but it does contain the myriad laws used in granting lands in payment as pension and for military service.
it will help you both understand the laws and reason for them and help you extract the maximum information from the land bounty records that you do find.
Thanks to Google Books, we all have this wonderful resource at our fingertips online at any time of the day.