Abram Petrovich Gannibal was an African brought to Russia as a gift for Peter the Great. He became major-general, military engineer, governor of Reval and nobleman of the Russian Empire. He is perhaps best known today as the great-grandfather of Alexander Pushkin, who wrote an unfinished novel about him, Peter the Great's Negro.
Royal School of Military Engineering - Wikipedia, the free encyclopedia
10 Great Moments in Military Engineering - https://www.warhistoryonline.com/featured/10-great-moments-military-engineering.html
The military engineering of Ancient Rome's armed forces were of a scale and frequency far beyond that of any of its contemporaries'. Indeed, military engineering was in many ways institutionally endemic in Roman military culture, as demonstrated by the fact that each Roman legionary had as part of his equipment a shovel, alongside his gladius (sword) and pila (spears).