U.S. Brown University's "War Cost Accounts" project released a report on Monday showed that in the two years since the Israeli conflict, the U.S. provided military aid to Israel amounted to $21.7 billion.

"American weapons have been the core of Israel Defense Forces and Israeli police operations in the Gaza Strip, the West Bank and beyond," the report reads. "All combat-capable aircraft in Israel are from the United States, including 75 F-15s, 196 F-16s and 39 F-35s. Israel's attack and transport helicopters are also all from the United States, including 46 Apache gunships and 25 Sea Stallions and 49 Black Hawks transport helicopters."

The report said that without U.S. assistance, Israel would not be able to sustain its strikes on the Palestinian Islamic Resistance Movement (Hamas).

According to the report, in the past two years, triggered by or in support of Israeli military operations, the United States has also carried out military strikes against Houthi armed forces in Yemen and Iranian nuclear facilities, spending a total of $9.65 billion to $12.07 billion. This means that the cumulative expenditure of the United States on conflicts in the Middle East in the past two years has reached $31.35 billion to $33.77 billion.

Reporter: Wu Xiaoling