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Military History of Ukraine: How the Army Changed Over Time

The story of Ukraine's armed forces runs through five eras: the druzhyna and people's levy of Kyivan Rus, the Cossack Host with its elected hetmans, the national army of 1917 to 1921, the founding of the modern Armed Forces in 1991, and the period since the 1996 Constitution, when defence became a clear duty of the state and the army was reformed after 2014. Each era shows how a society organises defence: who serves, who leads and by what rules.

🎬 Step-by-step story

  1. Era 1, 9th to 13th century. In Kyivan Rus, the prince kept a druzhyna of professional warriors. When danger grew, ordinary people were also called up.
  2. Era 2, 15th to 18th century. Cossacks formed a free military community at the Zaporozhian Sich. They elected their leaders, such as the hetman, and used fast boats on rivers.
  3. Era 3, 1917 to 1921. During the independence years, a regular national army was built for the first time in modern form, with ranks and its own flag.
  4. Era 4, 1991. When the state became independent, a law on the Armed Forces created the army of today. Armed Forces Day is on 6 December.
  5. Era 5, 1996 to today. The Constitution, Article 17, says defending the country is a duty of the state. After 2014 the army was reformed and grew.
  6. Now you try. Move the slider and pick any era. Compare who served, who led and what rules they followed.

Tip: drag the 3D scene to turn it. Use two fingers to zoom.

🤔 Common doubts, cleared

Was the druzhyna a modern army?

No. It was a small group of warriors close to the prince, plus a people's levy in big wars.

Why did Cossacks need boats?

Rivers were their roads. Light boats let them move fast along the Dnipro and nearby waters.

Why do we say 'first modern army' for 1917 to 1921?

Because it had regular ranks, units, uniforms and a national flag, like a state army.

Why is 6 December special?

On that date in 1991 the law creating the Armed Forces was adopted, so it is marked as Armed Forces Day.

What does Article 17 say in one line?

Defending the country is a most important task of the state and a matter for the whole people.

Which era came first on the line?

Kyivan Rus. Slide to the left end to compare it with the later pillars.

Kyivan Rus: druzhyna and people's levy (9th to 13th century)

In the early state of Kyivan Rus, the prince had a druzhyna: a group of full-time warriors who lived and fought with him. They were paid with a share of tribute and spoils and gave him advice.

For a big war the prince also called the levy (opolchennia), ordinary townspeople and farmers. So there were two parts: a small professional core and a large people's force.

Idea to remember: the army belonged to the prince personally.

The Cossack Host (15th to 18th century)

Cossacks were free people on the southern frontier. Their centre was the Zaporozhian Sich, a fortified settlement beyond the river rapids of the Dnipro.

Idea to remember: choice of leaders by the community.

The national army of 1917 to 1921

After the collapse of the old empires in 1917, Ukrainian national governments tried to build a regular army with ranks, uniforms, units and a national flag. Conditions were very hard: wars on several fronts, changing governments and few resources.

The effort ended by 1921, but it left an example of a national army that later generations remembered.

Idea to remember: the first modern, state-style national army.

The Armed Forces are founded (1991)

After independence was declared in 1991, Ukraine took command of the military units on its territory and passed a law on the Armed Forces on 6 December 1991. That date is celebrated each year as Armed Forces Day.

Key words: sovereignty (the state decides for itself) and civilian control (elected leaders, not generals alone, direct the army).

Idea to remember: a new state needs its own army under its own law.

Constitution, laws and reform (1996 to today)

The Constitution of 1996 sets the legal basis. Article 17 says protecting sovereignty and territorial integrity is a most important function of the state and the business of the whole people. The Armed Forces serve this aim, and other laws (on defence, on the Armed Forces, on military duty) give the details.

After 2014 the army went through deep reform and growth: better training, equipment and organisation, and strong support from volunteers and society.

Idea to remember: the army is under the law and defence is a duty of the whole society.

Try it

In the 3D: in step 5, move the slider to each pillar. For each era write one line: who served, who led. Then check with the captions.

At home: draw a timeline on paper with five dots and the years 9th-13th c., 15th-18th c., 1917-21, 1991, 1996 and later. Put one small symbol on each dot (shield, boat, flag, book, tablet).

Key formulas and definitions

Worked examples

1. Put these in time order: Cossack Host, Armed Forces founded, Kyivan Rus druzhyna.

Kyivan Rus druzhyna (9th to 13th c.), Cossack Host (15th to 18th c.), Armed Forces founded (1991).

2. Who chose the leaders in the Cossack Host, and how is this different from the druzhyna?

A community council elected leaders such as the hetman. In the druzhyna the warriors followed the prince, who was not elected by them.

3. Why did the 1991 law matter for a newly independent state?

It created the state's own army under its own law, so decisions on defence were made by the Ukrainian state itself (sovereignty) and under civilian control.

Common mistakes

Practice quiz

1. Which group served the prince in Kyivan Rus?
2. In the Cossack Host, leaders were:
3. When were the modern Armed Forces of Ukraine founded by law?
4. Which article of the 1996 Constitution speaks of defence of the country?
5. Armed Forces Day is celebrated on:

Practice: answer these yourself

Type or choose your answer, then press Check. Use a hint if you are stuck; the full solution appears after you answer.

Frequently asked questions

How did the Ukrainian army develop over time?

From the prince's druzhyna in Kyivan Rus, to the elected Cossack Host, to the national army of 1917-21, to the Armed Forces founded in 1991 and reformed after 2014.

What is the legal basis of the Armed Forces of Ukraine?

The Constitution (Article 17) and laws such as the law on the Armed Forces and the law on defence, which set the role, command and civilian control.

When is Armed Forces Day in Ukraine?

6 December, the day the 1991 law on the Armed Forces was adopted.

Where this is taught

Ukraine10 класHistory of the Ukrainian army
Ukraine10 класArmed Forces of Ukraine

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