civil war.
The Somme or Verdub
The Battle of Stalingrad during the Second World War cost the lives of about 2 million people . This was the costliest battle in human history . Below is a relevant link to the battle of Stalingrad .
Battle of Gettysburg.
the costliest and most destructive war in human history would be world war 2. taking in the account of inflation, and loss of human life this war left a reconizable scar on the history of man I can't answer your question because it is not complete. Sorry I didn't answer your question. Next time read it out loud because you might understand it but other people might not.
okinawa
the battle for okinawa 360 mile from japan
the battle for okinawa 360 mile from Japan
The most expensive war in history was World War II, with an estimated cost of over 4 trillion in today's money.
The total direct and indirect cost of World War I was 337 billion dollars. It proved to be the costliest war to date at the time.
Battle of Anteitum, General Ulysass S. Grant
The five costliest battles of the Civil War were The Battle of Gettysburg, Battle of Chickamauga Battle of Chancellorsville , Battle of Spotsylvania and Battle of Antietam. All but the last two occurred in 1863.
World War II