Venice had many waterways and canals. Florence made cloth out of English wool.
The Mongols treated the non-muslim subjects most fairly, while the Ottomans treated them the least fairly.
The Mongols were religiously tolerant because they conquered and rule through manpower rather than religion. The Ottomans were the least fair to non-muslims. It is close between the Umayyads and the Ottomans, but the only difference is the amount of discrimination (per se) held against non-muslims. While the Umayyads only had the jizya (tax paid if you were non-muslim), the Ottomans had distinctive restrictions on non-muslims. They had dress codes according to their religion and could only reside in neighborhoods who's residents were of the same religion (under the Ottomans).
They attacked only at night under the cover of darkness. Their tactic was to engage in small skirmishes in the South Vietnamese countryside where they were familiar with the area. They used guerilla warfare and had their trip wires and pits with sharpened bamboo stakes to demobilize the enemy. After the battle, they escaped back to the jungle.
Dogs fight with each other to assert their dominance and it could be playing around for them.
