It steadily weakened Cause_change_of_strength as it progressed Achieve south over interior Western Australia , diminishing Cause_change_of_position_on_a_scale below tropical cyclone Catastrophe status on 18 March .

Surrounded Surrounding by enemies and with diminishing support Supporting due to the constant warfare Hostile_encounter , Ivaylo fled Escaping to the court of the Mongol warlord Nogai Khan to seek aid Assistance , but was eventually murdered Killing .

Rapid weakening Cause_change_of_strength ensued Coming_to_be once the storm Catastrophe moved Motion over the high terrain of Mexico , with Diana diminishing Cause_change_of_position_on_a_scale to a tropical depression roughly 24 hours after moving Motion onshore .

Both countries sustained friendly relations until 1003 when another war broke out Process_start , further diminishing Cause_change_of_position_on_a_scale Bulgarian power in Eastern Europe .