European border policy

With the Maastricht Treaty of 1992 and later Lisbon in 2007, the European Union abolished solidarity as an internal border and established an area of ​​freedom, advocating solidarity as a means of to prevent or deal with any risks which might be encountered by another State .
Significant legislative regulation is mutual assistance in cases where a Member State receives a democratic attack or is affected by a natural or man-made disaster. The Union shall mobilize all that it has at its disposal, including military personnel at the disposal of the Member States. "
This declaration, Article 22 (1) of the Treaty on the Functioning of the European Union, defines the concept of a solidarity clause, which gives it a supranational character as it governs all the Member States of the European Union in order to deal with, prevent and protection against terrorist attacks, natural and man-made disasters.
In 2016 and 2018, the EU joined the establishment of two very important European institutions, the Permanent Structured Partnership (PESCO) and FRONTEX.
So the main goal of PESCO is the development of Western capabilities and their availability for military operations. This will contribute to a more effective protection of the Union from external risks as well as strengthen its role as a partner in international security. It is important that PESCO's tonal framework for the security of the Union's territories and citizens and investments in the security sector are binding on States, in contrast to the mutual assistance clause at the discretion of each Member State.
Although FRONTEX is essentially a European organization for the management and reduction of illegal immigration, it has made significant contributions to the protection of the Greek border from Turkish violations, but also of other European Mediterranean it is necessary to refer to it as a Mechanism to prevent the breach of the borders of a Member State.
The absence of practical solidarity is also reflected in many of the articles of the Treaties, which include this concept. Specific articles of the CFSP, which are annexed to the Lisbon Treaty and refer to the Common Foreign Policy, have no binding character for the states, due to the absence of a legislative character. Decisions taken concerning military conduct and must be unanimous, while the rest are taken by a qualified majority.
In addition, under a so-called "constructive abstention", a state may decide to enter into a decision which is contrary to its interests. Finally, reference should be made to Article 42 (7) of the Treaty of Lisbon, according to which States have an obligation to provide assistance and assistance to a Member State which is responsible for an armed attack on its territory, but this provision " shall not prejudge the specific security and security policy of the Member State concerned ".
Consequently, the European Union is not a coalition-military alliance, while solidarity seems to exist under conditions and only when it does not run counter to the most interested states.