The Army still trains some troops in the use of horses, such as some units received/receive before deploying to Afghanistan.
Some troops still carry and fight with tomahawks, I think there have been at least 2 cases where tomahawks were used in hand to hand.
Yes, tactical tomahawks are standard issue with infantry and special operators. Tomahawks are a versatile tool and, of course, a deadly close combat weapon when used in properly trained hands.