If DTaP #4 is given with at least a 4-month interval after DTaP #3, it does not need to be repeated. The minimum age of 12 months for the fourth dose must be met. Decreasing the interval to less than 6 months, however, is not recommended.
The total given by the VA for the Indian Wars (1,000) seems to be a wild guess. Just two major defeats -- Custer's and St. Clair's -- add up to about 900 dead all by themselves. The official number of Americans killed in the Revolutionary War (4,435) is only about 2/3 the numbers usually given by historians. The total of US combat deaths during the Civil War is given as 140,414 -- or some 30,000 higher than most historians would estimate. I suspect (but don't know for sure) that the boost may come from the DoD counting deaths among POWs as combat rather than disease.
But for the USSR, victory came at an even steeper price, as the Soviets lost nearly twice as many soldiers as the Nazis in that battle alone. In all, at least 8.7 million Soviet soldiers died in World War II (Halloran notes that some estimates place the tally as high as 14 million). That number becomes all the more eye-popping when compared to the losses incurred by other countries.