Quick Answer: 2024 was a leap year starting on Monday of the Gregorian calendar, the 2024th year of the Common Era and Anno Domini designations, the 24th year of the 3rd millennium and the 21st century, and the 5th year of the 2020s decade. The year saw the continuation of major armed conflicts, including the Russo-Ukrainian war, the Myanmar civil war, the Sudanese civil war, and the Islamist insurgency in the Sahel. Israel's war on Gaza led to widespread protests and spillover conflicts into numerous other countries, most notably Lebanon, which was invaded by Israel in October. This followed an intensification of the ongoing conflict between Israel and Hezbollah. In September, Israel escalated an offensive against the group, which resulted in the killing of the Secretary-General, Hassan Nasrallah. Ismail Haniyeh, the political leader of Hamas, had also been assassinated in the Iranian capital Tehran in July, and his successor Yahya Sinwar was killed by the Israel Defense Forces in October.