<Tr> <Td> The United States declares neutrality . </Td> <Td> </Td> </Tr> <Tr> <Td> August 4--16 </Td> <Td> The Germans besiege and then capture the fortresses of Liège, Belgium . </Td> <Td> Details </Td> </Tr> <Tr> <Td> August 5 </Td> <Td> German Steamer SS Pfalz surrenders after being fired on by Fort Nepean, south of Melbourne, Australia </Td> <Td> </Td> </Tr> <Tr> <Td> Montenegro declares war on Austria - Hungary . </Td> <Td> </Td> </Tr>

What event pushed england to enter world war 1