Thanks Charl ...seems odd to answer with my post on another thread.
In warthunder , most of the British aircraft are in the one place for the purpose of a test flight ... some on the airfield at Ramsgate , and some are on a carrier just off the coast. Im not sure about the extent of this "world" but it seems to be just a few hundred square k's around Ramsgate and Dover.
The combat world extends a little more . If you select a German or French aircraft , you fly in their zone .
Most of the U.S stuff is based in or around Pearl Harbour (for test flights) .... Japan is in the pacific , not sure about Italy or Russia.
"nothing to shoot" ? No ... not in a test flight ... but you can use the weapons, otherwise you have the sky to yourself.