tactically — ODE

tactically /ˈtaktɪkli

▸ adverb

1 in a way that relates to actions carefully planned to gain a specific end:

she tactically refused to comment on the issue

[sentence adverb] tactically speaking, it was a bad move.

▪ in a way that relates to military tactics:

every aspect of the training must be tactically oriented

the operation was commanded tactically by a British Army officer.

2 British English with the aim of preventing the strongest candidate from winning by supporting the next strongest, without regard to one's true political allegiance:

Labour supporters voted tactically to keep out the Tory.