In fact, Sun Quan did not stick to Hefei all the time. Invasion of Cao Wei from Xiangfan many times. In 220 AD, Cao Pi gave up Xiangyang for some reason. When Sun Quan learned the news, he immediately sent troops to occupy Xiangyang. Xelloss immediately ordered Coss and Huang Xu to attack and win Xiangyang again.
In 226 AD, after Cao Pi's death, Sun Quan sent troops to attack Xiangyang again. At that time, Sun Quan led an army to besiege Jiangxia and sent Zhu Gejin, Zhang Ba and others to attack Xiangyang. When Cao Cao learned the news, he immediately sent Sima Yi to attack, defeated Zhu Gejin, and killed more than 1,000 Zhang Ba and Wu Dong troops. ?
Jingzhou has a completely different meaning to Wu Dong and Han Shu. Jingzhou is in the hands of Shu Han, which is mainly used as a forward base, that is, a strategic offensive base. For Wu Dong, it is mainly to control Jingzhou in his own hands to feel safe.
North of Jingzhou is Xuchang, and further north is Luoyang. Xuchang was the capital of the country at that time, and Emperor Xiandi was there. Xuchang's army must be very strong. Luoyang was later the capital of Cao Wei. Luoyang has the natural barrier of Hulao Pass, which is easy to defend but difficult to attack. Unlike Shu Han, Wu Dong has a narrow geographical scope and can only attack Liangzhou.
The border between Wu Dong and Cao Wei is very long, so he has more choices. In contrast, Hefei's defense is certainly not as good as Xuchang and Luoyang, and it is naturally much easier to fight.
There were no cars in ancient times, so naturally it was not so fast. If you ride a horse, you can get there in one day at most. Let's take a look at Xiangyang, a military town in Jingzhou, which is nearly 550 kilometers away from Nanjing, almost three times the distance from Hefei to Nanjing. In this context, if Sun Quan mobilized troops to make a northern expedition from Jingzhou, Cao Wei could lead his troops from Hefei to Jianye (Nanjing), the capital of Sun Quan. At that time, Sun Quan would not immediately have loose bowels, at least he would never dare to continue the Northern Expedition.
But then again, although Dongwu has repeatedly attacked in Jianghuai, it has not made much progress. It never broke through the Hefei defense line of Cao Wei, and in fact it did not attack with all its strength. In contrast, it was Zhuge Ke's Northern Expedition that mobilized almost all the troops that could be mobilized in Wu Dong, which was also in vain.