(Washington Composite Electric) A senior official of the US Department of Defense pointed out that Russia was frustrated in the initial war against Ukraine, and now it may turn strategic to siege.He warned that the Russian army adopted this strategy may cause more civilian casualties and more civil facilities were destroyed.

The anonymous official told Reuters the day before yesterday that the U.S. government evaluated that the Russian army's invasion in the past four days has made only limited progress. In addition to because the Ukraine has made tenacious resistance, the Russian army also has some strategic strategies because of some strategic strategies.Missing has led to the dilemma of some troops facing fuel and supplies.

The United States evaluates more than 350 missiles against Ukraine

This official revealed that according to the US government's evaluation, the Russian army has so far the target of UkraineA launch of more than 350 missiles, some of which hit civil infrastructure.However, Russian missiles still mainly focus on attacking Ukraine's military goals.

The official takes the Russian army's offensive to Chernihiv, the northern city of Kiev, Ukraine as an example. It means that the initial sign shows that the Russian army may be adopting a siege war; this strategy will increaseThe possibility of damage to damage causes non -military personnel to be injured or affected schools, hospitals and houses.

The siege battle usually involves surrounding enemy positions, cutting off the supply and escape routes, and then a joint force consisting of armored forces, ground forces, and engineering soldiers launched an attack.

The United Nations estimates that the war launched by Russia to Ukraine has caused at least 102 civilian deaths, including seven children, and the actual number of deaths may be higher.

The official said that about one -third of Putin's deployment of the Russian border has not yet entered Ukraine, but the number of troops entering Ukraine in recent days is increasing rapidly.

According to the analysis of military experts, although the Russian army deployed hundreds of precise and powerful ballistic missiles in this invasion operation, the Urpicious Defense forces have not suffered a severe frustration.

U.S. Experts: The Russian Army will dispatch the air defense forces to strengthen the offensive in the next few days

Because China, North Korea and other countries have also developed advanced weapons in recent years, such as China, North Korea, etc.The damage effect of the Russian ballistic missile in actual combat has aroused worldwide attention.The former North Korean intelligence officer Garoscas said: "North Korea and the Chinese military are using this for reference."

According to US statistics, the Russian army launched from sea and land on the first day of the war.In addition to the main short -range ballistic missiles, there are also cruise missiles and ground -to -air missiles.

Ananda, a senior researcher at the Carnegie International Peace Foundation in the United States, said that these are the most densely short -range ballistic missile bombing when the two territories are connected to the country.

According to military experts, Russia's missiles hit some Air Force bases in Ukraine, but because the war is still ongoing, it is not yet possible to determine the goal of the Russian missiles and the damage caused by it.

Some US officials said that there were signs that the launch of the Russian army's missile failed."This is not the majority, but we believe that some of the (missiles) are not successfully launched."

The American Institute of War believes that the Russian army has not played its best. It is expected that more offensives will be launched in the next few days, including more offensives, includingDispatched air defense forces to break the final line of Ukraine.