Beating on one country until near destruction often sets the tone to get smashed back
Lately maps have been won usually in the weee hours of the morning when no one is on and typically Bish horde the morning often leaving Knights with 40% of their bases. This then means they bite off more than they can chew and often leave a wide open front while people log on and start giving them a fight. Then its rinse, lather, repeat.
Its not bad juju, its common sense and unless you play to full reset, purging other country basses just sets you up to get a beat down later.