Black Mug 15oz - 6th Squadron, 1st Cavalry Regiment - Guidon - Waving X 300 Worms which has a long history

which has a long history as a royal regiment

The "X 300" likely refers to a specific design variation or a designation within the battalion

South Korea

according to this Instagram post and this YouTube video

It was created to formally recognize the senior enlisted advisor to the commander within a color-bearing unit

Black Mug 15oz - 6th Squadron, 1st Cavalry Regiment - Guidon - Waving X 300 Worms which has a long historyBlack Mug (11oz, 15oz) Generic brand Warm your soul with a nice cuppa out of this black ceramic mug. Customize with cool designs, photos, or logos to make that aaahhh! moment even better. Its BPA and lead free, microwave and dishwasher safe, and made of black durable ceramic and available in 11 ounce and 15 ounce sizes. The high quality sublimation printing makes this black ceramic mug the perfect gift for your true coffee, tea, or hot chocolate