Around 1,500 aircraft took part Dispersal in the air battles which lasted Being_in_operation until dusk .

By dusk on 19 February , a Naval Central Strike committee was elected Change_of_leadership .

The battle Hostile_encounter lasted from about 9 am to dusk .

After being driven Motion off the field and failing in an attempt to regroup Cause_to_amalgamate at Chester itself , the Royalists retreated Escaping as dusk fell .

Parents , teachers and students volunteer and plan Arranging ahead to have everything arranged Arranging for the day of the festival Social_event , and contribute Giving until it is over at dusk .