Dragon dancers perform as Chinese guided-missile frigate Wuhu prepares to dock at the international port in Manila on January 17, 2019. - A Chinese naval task group, consisting of two frigates -- the Wuhu 539 and Handan 579 -- and a replenishment ship Dongpinghu (960) arrived at Manila's international port for a four-day goodwill visit. (TED ALJIBE/AFP/Getty Images)
Ukrainian MI-24 helicopters take part in a military drill on the coast of the Sea of Azov near Mariupol on January 20, 2019. (ANATOLII STEPANOV/AFP/Getty Images)
Turkish-backed Syrian fighters participate in a training exercise using an armored vehicle provided by the Turkish army, near the town of Tal Hajar in Aleppo's province, a few kilometres from areas controlled by a Kurdish-led coalition, on January 16, 2019. - Turkey has threatened to launch a vast cross-border offensive against the Kurdish People's Protection Units (YPG), which controls most of northeastern Syria. Syria's Kurds today rejected a US proposal for a "security zone" under Turkish control along the Syrian side of the two countries' border. (BAKR ALKASEM/AFP/Getty Images)
A battery of Israel's Iron Dome defense system, designed to intercept and destroy incoming short-range rockets and artillery shells, stands in Mount Hermon in the Israeli-annexed Golan Heights on January 21, 2019. - Prime Minister Benjamin Netanyahu said today Israel would not allow "Iranian aggression", after its military struck what it called Iranian targets in Syria in response to missile fire. (JALAA MAREY/AFP/Getty Images)
Indian Army T-90 (Bhishma) tanks take part during the Army Day parade in New Delhi on January 15, 2019. - The Indian Army celebrated the 71st anniversary of the formation of its national army with soldiers from various regiments and artillery taking part in a parade. (MONEY SHARMA/AFP/Getty Images)
A US army convoy patrolling near the city of Tall Tamr, in the northwestern Syrian province of Hasakah on January 16, 2019. (DELIL SOULEIMAN/AFP/Getty Images)
In this photo released by the Syrian official news agency SANA, shows missiles flying into the sky near international airport, in Damascus, Syria, Monday, Jan. 21, 2019. In a very unusual move, the Israeli military has issued a statement saying it is attacking Iranian military targets in Syria. It is also warning Syrian authorities not to retaliate against Israel. (SANA via AP)
French-made Mirage fighter jets taxi on the runway during an annual exercise at the Hsinchu air force base in Taiwan on January 16, 2019. (SAM YEH/AFP/Getty Images)
M60A3 Patton tanks move during a military exercises in Taichung, central Taiwan, Thursday, Jan. 17, 2019. TaiwanÕs military conducted a live-fire drill to show its determination to defend itself from Chinese threats. (AP Photo/Chiang Ying-ying)
A military vehicle is on fire at the scene of a suicide car bomb attack on a military convoy on a road in Syria's northeastern Hasakeh province, which killed five members of a Kurdish-led force accompanying US-led coalition troops on January 21, 2019. - The attack, claimed by the Islamic State group, killed five members of a Kurdish-led force accompanying US troops in an anti-jihadist coalition, according to the Syrian Observatory for Human Rights monitoring group. (AFP/Getty Images)
Indian Army soldiers demonstrate combat skills during the Army Day parade in New Delhi on January 15, 2019. - The Indian Army celebrated the 71st anniversary of the formation of its national army with soldiers from various regiments and artillery taking part in a parade. (MONEY SHARMA/AFP/Getty Images)
Paratrooper soldiers from the 8th Marine Infantry Parachute Regiment (8e RPIMA) prepare at the air force base 101 Toulouse-Francazal, near Toulouse, southern France, on January 17, 2019, before the arrival of the French president to address the armed forces. (LUDOVIC MARIN/AFP/Getty Images)