There are prolonged battle sequences. Many people are shot and stabbed in battle. The hospital scene is all audio from a character behind a curtain.
Thousands of men charge a defensive position. The two sides fire volleys of musket fire into each other killing dozens. A man's head is blown off by a cannonball (seen from behind, very brief). Several soldiers are dismembered or limbs are blown off, though not shown for very long. There are bloodied swords and bayonets, and there is blood on the ground. Dying people are shown but it is always quick.
A scene at a hospital, where a soldier receives bandages to a slight wound in his neck. We see, though not as the focus of the scene, soldiers getting limbs amputated. Several men are screaming and yelling in pain. Some blood but the amputations are mostly obscured. A curtain covers a man up who is getting his leg cut off. He cries for them to stop. This is focused on in the scene so it is hard to miss.
A sergeant punches and kicks his men during training. A couple of scuffles but nothing too violent.
A soldier is whipped several times in a scene for desertion. His shirt is torn off and we see his already whipped back. He grimaces in pain with each blow. Most of the whipping is off camera, but can be heard. The man cries. This is not only violent but emotional which makes it worse.
Soldiers wait outside for soldiers to come. Men charge out on horses and are shot. More men come in and a fight begins. People get shot and the camera cuts away quickly. One part shows a man who gets shot and some blood gushes out of his wound. He dies.
An army charges a fort. Several men are blown up or shot by cannons and musket. One character runs forward and gets shot multiple times. Other characters charge at the fort and are shot. Enemies are stabbed and shot at point blank range(albeit in the dark) and a group of men charge to the center of the fort and are stopped by a canon that shoots them all. The camera cuts away just as the canon fires.