In 1795, the Americans also negotiated a favorable deal with the Spanish. Fearing a British attack on New Orleans, the Spanish suddenly sought improved relations with the United States and allowed Americans to export their goods through New Orleans without paying any duties. The Spanish also withdrew from their forts within the American boundary line. As trade down the Mississippi to New Orleans boomed, more settlers moved west to exploit the fertile lands. Federal land sales soared, generating revenues for the federal government. In sum, between 1794 and 1796, the United States dramatically gained control over its long western frontier.