(1) you may refute an anticipated counter-argument by proving that it is untrue (sort of a preemptive strike), as in, "While the federal census of 1890 seems to suggest an increase in black mortality, that census was infamous for recording specious data."
(2) you may concede certain points: accept the truth of statements which seem to refute your argument, but explain why they actually do not harm your argument (sort of a strategic retreat), as in "It was indeed true that Latino youth were incarcerated at a rate three to four times greater than Anglo youth, yet this may suggest the iniquitous workings of the local justice system rather than a Latino propensity towards crime."
In history, these strategies often mean dealing with evidence that seems to undermine the point you are trying to make. It is crucial that you not ignore this evidence; after all, the reader will not. Selectively invoking evidence while ignoring counter-arguments undermines your credibility, and hence the