Hundreds of thousands on both sides. (If you were wounded, you were likely to die, as there were so few medical facilities.)
The most famous casualties among the Generals were:
Stonewall Jackson (Confederate) - killed by his own men in the hour of his greatest glory at Chancellorsville.
Earl Van Dorn (Confederate) - killed in a duel with his medical officer over the latter's wife.
Sidney Johnston (Confederate) - killed in the first big battle in the West, regarded by some as the best General in America.
Joseph E. Johnston (Confederate, and no relation to the above) - badly wounded and hospitalised in the Peninsula campaign, and having to be replaced by Robert E. Lee. They tried to put Johnston back in uniform before he was properly recovered, and he had to go back to hospital.
John Bell Hood (Confederate) - lost and arm and a leg, but remained a popular leader, strapped to his horse.
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UNIONS: 1,734 was killed, 8,066 was wounded, 6,055 missing/captured. CONFEDERATES: 3,494 was killed, 15,758 was wounded, 952 missing/captured.
one is asking about the civil war and the other isn't
38,000 Americans wounded and 12,000 killed or missing
Australia: 18.500 wounded and missing - 7,594 killed. New Zealand : 5,150 wounded and missing - 2,431 killed. British Empire (excl. Anzac) : 198,000 wounded and missing - 22,000 killed. France : 23,000 wounded and missing - 27,000 killed. Ottoman Empire (Turkey) : 109,042 wounded and missing - 57,084 killed. Furthermore 1.700 Indians died in Gallipoli, plus an unknown number of Germans, Newfoundlanders and Senegalese.
Among the Union casualties, there were 460 killed, 1,124 wounded, and 1,312 missing or captured. For the Confederate casualties, there were 387 killed, 1,582 wounded, and 13 missing. Francis S. Bartow was the first Confederate brigade commander to be killed in the Civil War. General Bee was mortally wounded and died the following day.
Confederate Forces Killed: 2,592 Wounded: 12,709 Missing: 5,150 Total: 20,451 Union Forces Killed: 3,072 Wounded: 14,477 Missing: 5,434 Total: 22,983 Combined: 43,434 Source: "General Lee", General Fitzhugh Lee, p.302
KIA - Killed in Action WIA - Wounded in Action (may or may not be able to continue to fight) MIA - Missing in Action
The war ended up costing the Union 350,000 men killed, and tens of thousands more wounded or missing. The financial cost of the war for the Union was tens of millions of dollars.
Approximately 600 Australian servicemen were killed in Vietnam, and over 1200 wounded.
about 35,000 killed plus wounded and missing
Killed in Action, or KIA. Wounded in Action, or WIA. I think captured is Prisoner of War. POW. Missing in Action, MIA.
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UNIONS: 1,734 was killed, 8,066 was wounded, 6,055 missing/captured. CONFEDERATES: 3,494 was killed, 15,758 was wounded, 952 missing/captured.
Since Americans were killing Americans, it was the US Civil War (aka American Civil War).
one is asking about the civil war and the other isn't
Numbers vary, around 600,000 killed and 500,00 to 600,000 wounded. Not sure on MIA.