A.C. Moore offers a 15% military discount --- All you need to do is present your military ID. The discount comes off regular and sale price, but you can't combine it with a total off coupon or use it to buy a gift card. This discount is ongoing. The language states present and past tense, so if you're retired with a military ID, definitely ask.
Michael's offers a 10% off military discount -- you will need to present ID and be the service member or immediate family. This discount is ongoing.
Jo-Ann's military discount -- 20% off during designated military discount dates. These are typically the days around Veterans' Day (Nov 11), Fourth of July, etc. The discount is for past and present military and you will need to present proof of service and/or military ID. Dependent ID is also valid.