Good. If Trump can't have his wall, the Military is the next best thing.
But let's just be clear, if the Chinese could build a 5,500 mile border wall 2,300 years ago to defend itself from Mongolian nomadic armies, then we can build one that's 3,500 miles shorter, with vastly superior technology and ethics.
But yeah. Let's keep snorting condoms and scarfing down Tide pods.
The wall barely slowed down the Mongolian people. They easily climbed over it. It stopped their horses and wagons full of supplies such. How many Mexicans do you think are bringing their horses or wagons full of provisions with them?
Sigh, the Chinese manned the wall, built it in strategic locations, such as mountainous terrain. They didn't just build the wall and leave, they used it to their advantage.
You really need to study up on things before you try to discuss them. Yes, they manned the wall, and it was effective for fighting off armies, and all the materials, supplies, and other things that an army needs to move forward. Those armies were large, and easily spotted so a large contingent could be sent to the part of the wall under attack. Individuals, who weren't seen as a threat, could easily cross the wall with little or no concern for being stopped. Again, I don't see a lot of Mexicans headed this way with horses and wagons the way an army would in between 11BC and the 1600s when it was built.