The strategic importance of the bay was noticed by the Marquis de Lafayette during the American Revolutionary War , who proposed the use of Pea Patch Island at the head of the bay for a defensive fortification to protect the important ports Philadelphia and New Castle , Delaware .
DET ADJ NOUN ADP DET NOUN AUX VERB ADP DET PROPN PROPN PROPN ADP DET PROPN PROPN PROPN , PRON VERB DET NOUN ADP PROPN PROPN PROPN ADP DET NOUN ADP DET NOUN ADP DET ADJ NOUN PART VERB DET ADJ NOUN PROPN CCONJ PROPN PROPN , PROPN .