JAKARTA—Indonesia’s foreign minister said on Thursday her nation had entered a “new era of bilateral relations” with the United States, as the countries’ armed forces launched their biggest ever joint training exercise this week involving 3,000 troops. Speaking from Washington after meeting U.S. Secretary of State Antony Blinken and other officials, Retno Marsudi welcomed more U.S. engagement in the region and expressed high hopes for closer ties with the administration of U.S. President Joe Biden. “As a democratic country and Southeast Asia’s largest economy, a strong strategic partnership with Indonesia will provide significant added value for U.S. engagement in the region,” the minister told a news conference. The “strategic partnership” between the countries spanned trade, investment, security, and public health, she said, with the United States announcing this week it would donate an additional $30 million in COVID-19 assistance to purchase oxygen and medical supplies and to boost Indonesia’s vaccine …