Trench warfare was a type of surface warfare in which opposing infantries attacked, counterattacked, and defended from networks of trenches dug into the ground. Prolonged exposure of the soldiers' feet to damp, unsanitary, and cold conditions could lead to the medical condition known as "trench foot."
Because Mimban's dense and ionized atmosphere made air support difficult, the Imperial campaign against the Mimbanese Liberation Army was largely carried out by entrenched troops. The Rebel Alliance also utilized trenches on their base at Crait and at Echo Base on Hoth. In 34 ABY, the Resistance Army made use of the Rebellion's old trench system on Crait during its stand against the approaching First Order.
Imperial swamp troopers involved in trench warfare
Because Mimban's dense and ionized atmosphere made air support difficult, the Imperial campaign against the Mimbanese Liberation Army was largely carried out by entrenched troops. The Rebel Alliance also utilized trenches on their base at Crait and at Echo Base on Hoth. In 34 ABY, the Resistance Army made use of the Rebellion's old trench system on Crait during its stand against the approaching First Order.
- Solo: A Star Wars Story The Official Guide