Pickling - Pickling in a salt brine was the standard method of preserving meats and fish. Gelatine - Jelly or gelatine was used for preserving cooked meat or fresh fish.
The North Vietnamese strategy (before the U.S. pulled troops): guerrilla warfare and traps
The North Vietnamese strategy (after the U.S. pulls troops): organized warfare with tanks, infantry
Roman Empire
The Fall of the Western Roman Empire (also called Fall of the Roman Empire or Fall of Rome) was the process of decline in the Western Roman Empire in which the Empire failed to enforce its rule, and its vast territory was divided into several successor polities.
Invasions by Barbarian tribes
The most straightforward theory for Western Rome's collapse pins the fall on a string of military losses sustained against outside forces. Rome had tangled with Germanic tribes for centuries, but by the 300s “barbarian” groups like the Goths had encroached beyond the Empire's borders
