A “look back” period is where a government program or benefit looks back five years to see if you gave away any assets or money. If you did, and you are now seeking this government benefit, you may be ineligible or face a penalty.
Medicaid has this 5 year look back period which is a very serious matter.
The VA has no look back period. There are always rumblings that one will be established but as of right now there is no such period.