The phrase "tactical reasons" refers to the specific plans or actions taken for a particular purpose or advantage, especially in relation to a particular situation or goal. Full definition
In 2015, the two big parties received only 67 %; in 2010 it was only 60 %; and many who currently vote Labour or Conservative do so for tactical reasons. (labour-uncut.co.uk)
This is a card I applied for and hold for purely tactical reasons. (travelingformiles.com)
We have a much better squad, if we lose the game it'll be thanks to bad tactical reasoning throughout the game. (justarsenal.com)