Refers to Pennsylvania, known as the "Keystone State" due to its central location among the original Thirteen Colonies.

पेंसिल्वेनिया, जिसे "कीस्टोन राज्य" कहा जाता है।

English Usage: Many historical events took place in the Keystone State during the American Revolution.

Hindi Usage: अमेरिकी क्रांति के दौरान कीस्टोन राज्य में कई ऐतिहासिक घटनाएँ हुईं।