Datang: from a Nobody to a King!

I traveled through time and became a soldier who was about to starve to death in the Palace of Prince Qin of the Tang Dynasty. What's even worse is that when you open your eyes, it's the eve of the Xuanwu Gate Incident! Prince Li Jiancheng has led his troops to surround the Prince of Qin's Mansion, sharpening his sword to burn us all to death! The brothers were so scared that they all said they were doomed! At the critical moment, the God of War system is activated! [Choice 1: Kneel down and beg for mercy, and be hacked to death on the spot! [Option 2: Fight to the end, assist Li Shimin to ascend the throne, and be rewarded with a god-level novice gift package! Is this still a choice? I slashed my backhand and chopped off the head of the prince's vanguard general in front of Li Shimin! Li Er was shocked on the spot: "Sir, you are truly a god!" Cheng Yaojin: "I'm old Cheng, this guy can fight better than me!" Yuchi Gong: "I would like to call you the strongest in the Tang Dynasty!" Let's show our cards, stop pretending, I am the God of War of the Tang Dynasty! Destroy the Turks, pacify Goguryeo, and conquer the world! Li Er, follow my footsteps!