Meng Huo crossed Lushui, Zhuge Liang crossed Lushui. Why did all the soldiers die of poisoning?

After Meng Huo crossed the Lushui River, Ma Dai led the way to the lower reaches of Lushui River and crossed the water with a raft. Seeing that the water was shallow, most soldiers jumped off the raft and waded across. Unexpectedly, halfway through, they suddenly fell down, rushed to the raft and shook back to the north shore. They have been bleeding from their mouths and noses and died. Why is this?

Ma Dai was frightened and came to report Zhuge Liang overnight. Zhuge Liang asked the natives why. It turns out that green water is poisonous, it is hot in broad daylight, and toxic gas is being distributed. It must be cooled at night, and the poison gas will dissipate before the conversion.

Zhuge Liang chose five or six hundred chosen men, led by Ma Dai. It was not until midnight that I crossed Lushui safely and came to Jiashanyu. There are two mountains, and there is a road in the middle, which is only enough for one person to ride. Ma Dai suited himself and erected a stockade at the intersection.

Before long, Meng Huo's grain truck arrived with more than 100 cars of rations and was stopped by Ma Dai. Shu soldiers scattered the grain wagons and seized the grain wagons. The defeated army reported to Meng Huozhai. Meng Huo did not send troops to attack because the Shu army camped here for the summer. He is very comfortable and drinks heartily every day. After receiving the report of defeat, he ordered Busy Tooth to take 3,000 troops to recapture the grain and grass.

Busy tooth dragon came to Jiashanyu, and Ma Dai went out of Shu array. As soon as the war was over, Ma Dai gnashed her teeth. Marshal Dong Bi captured Meng Huo alive and took him to Shu camp. When Meng Huo was put in the account, Zhuge Liang asked with a smile, "You said last time that you would be convinced if I caught you again. How about today? " Meng Huo said, "It's not your skill, but my people are killing themselves. How can you be obedient? "

Meng Huo said to his brother Meng You, "Kong Ming asked me to guard the camp gate just to show off my strength, but I know its reality. Their camps are planted in lush trees, and I have a plan to break him. "

He explained the plan in detail, and taught Meng You to take more than 100 soldiers, load a few wagons with gold, silver and ivory rhinoceros horns, cross the Lushui River and go to Zhuge Liang's Dazhai.